Earth-moving machinery - Functional safety - Part 1: Methodology to determine safety-related parts of the control system and performance requirements (ISO 19014-1:2018, Corrected version 2019-02)

This part of EN ISO 19014 provides guidance and a methodology for determination of performance levels required for earth moving machinery (EMM), as described in EN ISO 6165 after a hazard is identified by risk assessment and a control is  determine as a safety related part of the control system (SRP/CS).

Erdbaumaschinen - Funktionale Sicherheit - Teil 1: Methodik zur Bestimmung sicherheitsbezogener Teile der Steuerung und deren Leistungsanforderungen (ISO 19014-1:2018, korrigierte Fassung 2017-02))

Dieses Dokument enthält eine Methode zur Bestimmung der Performance Levels, die für Erdbaumaschinen (EMM), wie in ISO 6165 definiert, erforderlich sind.
Eine Sicherheitsanalyse der Maschinensteuerung (MCSSA) bestimmt die Höhe der Risikominderung bei Gefährdungen in Zusammenhang mit der Steuerung, die für Sicherheitssteuerungen (SCS) erforderlich ist. Diese Minderung wird durch das Performance Level der Maschine (MPL) quantifiziert und die Gefährdungen werden anhand der in ISO 12100 oder durch andere Mittel definierten Risikobeurteilungsgrundlagen identifiziert.
ANMERKUNG 1   Der in Anhang A dargestellte Schritt 2 zeigt den Zusammenhang zwischen ISO 12100 und ISO 19014 als ergänzende Schutzmaßnahme auf.
ANMERKUNG 2   ISO 19014 kann auch für funktionale Sicherheitsanforderungen anderer mobiler Geländemaschinen verwendet werden.
Für diese als sicherheitsbezogen festgelegten Stellteile werden die Merkmale für die Architektur, die Hardware, die Umgebungsanforderungen für die Software und die Leistung von anderen Teilen von ISO 19014 abgedeckt.
ISO 19014 deckt die Gefährdungen ab, die durch den Ausfall der Sicherheitssteuerungen verursacht werden, mit Ausnahme von Gefährdungen, die aufgrund der Ausrüstung selbst entstehen (z. B. elektrische Schläge, Brände usw.).
Anforderungen des Diagnosedeckungsgrads ausgeschlossen.
Die vorliegende Norm ersetzt ISO 15998:2008.

Engins de terrassement - Sécurité fonctionnelle - Partie 1: Méthodologie pour la détermination des parties relatives à la sécurité des systèmes de commande et les exigences de performance (ISO 19014-1:2018, Version corrigée 2019-02)

Le présent document fournit une méthode pour la détermination des niveaux de performance requis pour les engins de terrassement (EMM), comme définit dans l'ISO 6165.
Une analyse de sécurité des systèmes de commande de la machine (MCSSA) détermine le degré de réduction des phénomènes dangereux associés aux systèmes de commande requis pour les systèmes de commande de sécurité (SCS). Cette réduction est quantifiée par le niveau de performance de la machine (MPL), les phénomènes dangereux sont identifiés selon les principes d'évaluation des risques définis dans la norme ISO 12100 ou par d'autres moyens.
NOTE 1: La deuxième étape, comme présenté dans l'Annexe A, démontre la relation entre l'ISO 12100 et l'ISO 19014 en tant que mesure complémentaire.
NOTE 2: L'ISO 19014 peut également être utilisée pour évaluer les exigences de sécurité fonctionnelle d'autres machines mobiles non routières.
Pour ce qui est des commandes déterminées comme étant relatives à la sécurité, les caractéristiques d'exigences et de performances environnementales de l'architecture, du matériel et du logiciel sont couvertes dans d'autres parties de l'ISO 19014.
L'ISO 19014 couvre les phénomènes dangereux dus au disfonctionnement fonctionnel d'un système de commande lié à la sécurité, et exclut les phénomènes dangereux dus à l'équipement lui-même (par exemple, choc électrique, incendie, etc.).
Les autres commandes qui ne sont pas des systèmes de commande de sécurité (SCS), qui n'atténuent pas un phénomène dangereux ni ne réalisent une fonction de commande, et les cas où les défaillances pourraient être constatées par l'opérateur, sont exclus de la présente norme (par exemple, les essuie-glaces, les phares, l'éclairage de cabine, etc.).
NOTE 3: Une liste de fonctions de sécurité est incluse dans l'Annexe D.
NOTE 4: Les avertisseurs sonores sont exclus des exigences de la couverture de diagnostic.

Stroji za zemeljska dela - Funkcijska varnost - 1. del: Metodologija ugotavljanja delov krmilnega sistema, ki so povezani z varnostjo in zahtevanimi lastnostmi (ISO 19014-1:2018, popravljena različica 2019-02)

Ta del standarda EN ISO 19014 podaja smernice in metodologijo za določanje ravni zmogljivosti, zahtevane za stroje za zemeljska dela (EMM), kot je opisano v standardu EN ISO 6165, potem ko je z oceno tveganja prepoznana nevarnost ter se določi nadzor kot varnostni del nadzornega sistema (SRP/CS).

General Information

Status
Published
Public Enquiry End Date
14-Jul-2017
Publication Date
27-Sep-2018
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
24-Aug-2018
Due Date
29-Oct-2018
Completion Date
28-Sep-2018

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SLOVENSKI STANDARD
SIST EN ISO 19014-1:2018
01-november-2018

Stroji za zemeljska dela - Funkcijska varnost - 1. del: Metodologija ugotavljanja

delov krmilnega sistema, ki so povezani z varnostjo in zahtevanimi lastnostmi (ISO

19014-1:2018, popravljena različica 2019-02)

Earth-moving machinery - Functional safety - Part 1: Methodology to determine safety-

related parts of the control system and performance requirements (ISO 19014-1:2018,

Corrected version 2019-02)
Erdbaumaschinen - Funktionale Sicherheit - Teil 1: Methodik zur Bestimmung
sicherheitsbezogener Teile der Steuerung und deren Leistungsanforderungen (ISO
19014-1:2018, korrigierte Fassung 2017-02))
Engins de terrassement - Sécurité fonctionnelle - Partie 1: Méthodologie pour la

détermination des parties relatives à la sécurité des systèmes de commande et les

exigences de performance (ISO 19014-1:2018, Version corrigée 2019-02)
Ta slovenski standard je istoveten z: EN ISO 19014-1:2018
ICS:
53.100 Stroji za zemeljska dela Earth-moving machinery
SIST EN ISO 19014-1:2018 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 19014-1:2018
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SIST EN ISO 19014-1:2018
EN ISO 19014-1
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2018
EUROPÄISCHE NORM
ICS 53.100
English Version
Earth-moving machinery - Functional safety - Part 1:
Methodology to determine safety-related parts of the
control system and performance requirements (ISO
19014-1:2018, Corrected version 2019-02)

Engins de terrassement - Sécurité fonctionnelle - Partie Erdbaumaschinen - Funktionale Sicherheit - Teil 1:

1: Méthodologie pour la détermination des parties Methodik zur Bestimmung sicherheitsbezogener Teile

relatives à la sécurité des systèmes de commande et les der Steuerung und deren Leistungsanforderungen (ISO

exigences de performance (ISO 19014-1:2018, Version 19014-1:2018)
corrigée 2019-02)
This European Standard was approved by CEN on 23 May 2018.

This European Standard was corrected and reissued by the CEN-CENELEC Management Centre on 06 February 2019.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATIO N
EUROPÄISCHES KOMITEE FÜR NORMUN G
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 19014-1:2018 E

worldwide for CEN national Members.
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SIST EN ISO 19014-1:2018
EN ISO 19014-1:2018 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 19014-1:2018
EN ISO 19014-1:2018 (E)
European foreword

This document (EN ISO 19014-1:2018) has been prepared by Technical Committee ISO/TC 127 "Earth-

moving machinery" in collaboration with Technical Committee CEN/TC 151 “Construction equipment

and building material machines - Safety” the secretariat of which is held by DIN.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by February 2019, and conflicting national standards

shall be withdrawn at the latest by February 2019.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,

France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,

Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
Endorsement notice

The text of ISO 19014-1:2018, Corrected version 2019-02 has been approved by CEN as EN ISO 19014-

1:2018 without any modification.
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SIST EN ISO 19014-1:2018
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SIST EN ISO 19014-1:2018
INTERNATIONAL ISO
STANDARD 19014-1
First edition
2018-06
Corrected version
2019-02
Earth-moving machinery —
Functional safety —
Part 1:
Methodology to determine safety-
related parts of the control system and
performance requirements
Engins de terrassement — Sécurité fonctionnelle —
Partie 1: Méthodologie pour la détermination des parties relatives à
la sécurité des systèmes de commande et les exigences de performance
Reference number
ISO 19014-1:2018(E)
ISO 2018
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SIST EN ISO 19014-1:2018
ISO 19014-1:2018(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2018

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
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Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved
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SIST EN ISO 19014-1:2018
ISO 19014-1:2018(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Method to determine MPLr for SRP/CS of earth moving machinery .............................................................5

4.1 General ........................................................................................................................................................................................................... 5

4.2 Machine Control System Safety Analysis (MCSSA) method ............................................................................. 5

5 Requirements for immediate action warning indicators........................................................................................... 6

5.1 General ........................................................................................................................................................................................................... 6

6 Performance level determination procedures ...................................................................................................................... 6

6.1 General ........................................................................................................................................................................................................... 6

6.2 Participants in the risk assessment ...................................................................................................................................... 6

6.3 Assessment and classification of a potential harm .................................................................................................. 6

6.4 Assessment of exposure in the situation observed ................................................................................................. 7

6.5 Assessment of a possibility to avoid harm ...................................................................................................................... 7

6.6 Determining the required MPL ................................................................................................................................................. 9

Annex A (informative) Process flow chart for machinery risk assessment ..............................................................11

Annex B (informative) Table of warning/operation indicators ............................................................................................13

Annex C (informative) Example of MCSSA Process ..............................................................................................................................14

Annex D (informative) List of possible safety control systems (SCS) of earth moving machines .......18

Bibliography .............................................................................................................................................................................................................................20

© ISO 2018 – All rights reserved iii
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SIST EN ISO 19014-1:2018
ISO 19014-1:2018(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso

.org/iso/foreword .html.

This document was prepared by Technical Committee ISO/TC 127, Earth-moving machinery,

Subcommittee SC 2, Safety, ergonomics and general requirements.

This first edition of ISO 19014-1, together with ISO 19014-2, ISO 19014-3, ISO 19014-4 and ISO/

TS 19014-5, cancels and replaces ISO 15998 and ISO/TS 15998-2, which have been technically revised.

The main changes compared to the previous documents are as follows:

— method for determination of performance levels and machine control system safety analysis,

— additional requirements for mobile machines,
— environmental test requirements for components of safety controls systems, and

— requirements for software validation and verification of machine performance levels.

This corrected version of ISO 19014-1:2018 incorporates the following corrections:

— in 4.2 c) 2), 4.2 d) 1), 6.1 and Annex C, the cross-references to the steps defined in 4.2 have been

corrected.

A list of all parts in the ISO 19014-series can be found on the ISO website. At the time of publication of

this document, Part 2, Design and evaluation of safety-related machine control systems, Part 4, Design and

evaluation of software and transmission for safety related parts of the control system, and Part 5, Tables of

performance levels, are under development.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2018 – All rights reserved
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SIST EN ISO 19014-1:2018
ISO 19014-1:2018(E)
Introduction

This document addresses systems of all energy types used for functional safety in earth-moving

machinery.
The structure of safety standards in the field of machinery is as follows.

Type-A standards (basis standards) give basic concepts, principles for design and general aspects that

can be applied to machinery.

Type-B standards (generic safety standards) deal with one or more safety aspects, or one or more types

of safeguards that can be used across a wide range of machinery:

— type-B1 standards on particular safety aspects (e.g. safety distances, surface temperature, noise);

— type-B2 standards on safeguards (e.g. two-hands controls, interlocking devices, pressure sensitive

devices, guards).

Type-C standards (machinery safety standards) deal with detailed safety requirements for a particular

machine or group of machines.
This document is a type C standard as stated in ISO 12100.

This document is of relevance, in particular, for the following stakeholder groups representing the

market players with regard to machinery safety:
— machine manufacturers (small, medium and large enterprises);

— health and safety bodies (regulators, accident prevention organisations, market surveillance etc.).

Others can be affected by the level of machinery safety achieved with the means of the document by the

above-mentioned stakeholder groups:
— machine users/employers (small, medium and large enterprises);

— machine users/employees (e.g. trade unions, organizations for people with special needs);

— service providers, e. g. for maintenance (small, medium and large enterprises);

The above-mentioned stakeholder groups have been given the possibility to participate at the drafting

process of this document.

The machinery concerned and the extent to which hazards, hazardous situations or hazardous events

are covered are indicated in the Scope of this document.

When requirements of this type-C standard are different from those which are stated in type-A or

type-B standards, the requirements of this type-C standard take precedence over the requirements of

the other standards for machines that have been designed and built according to the requirements of

this type-C standard.
© ISO 2018 – All rights reserved v
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SIST EN ISO 19014-1:2018
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SIST EN ISO 19014-1:2018
INTERNATIONAL STANDARD ISO 19014-1:2018(E)
Earth-moving machinery — Functional safety —
Part 1:
Methodology to determine safety-related parts of the
control system and performance requirements
1 Scope

This document provides a methodology for the determination of performance levels required for earth

moving machinery (EMM) as defined in ISO 6165.

A Machine Control System Safety Analysis (MCSSA) determines the amount of risk reduction of hazards

associated with control systems, required for Safety Control Systems (SCS). This reduction is quantified

by the Machine Performance Level (MPL), the hazards are identified using the risk assessment principles

as defined in ISO 12100 or by other means.

NOTE 1 Step 2 as shown in Annex A demonstrates the relationship between ISO 12100 and ISO 19014 as a

complementary protective measure.

NOTE 2 ISO 19014 can also be used to assess the functional safety requirements of other off-road mobile

machinery.

For those controls determined to be safety-related, the characteristics for architecture, hardware,

software environmental requirements and performance are covered by other parts in ISO 19014.

ISO 19014 covers the hazards caused by the failure of a safety control system and excludes hazards

arising from the equipment itself (for example, electric shock, fire, etc.).

Other controls that are not safety control systems (SCS), that do not mitigate a hazard or perform a

control function and where the operator would be aware of a failure, are excluded from this standard

(e.g. windscreen wipers, head lights, cab light, etc.).
NOTE 3 A list of safety control systems is included in Annex D.

NOTE 4 Audible warnings are excluded from the requirements of diagnostic coverage.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 6165, Earth-moving machinery — Basic types — Identification and terms and definitions

ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 6165 and ISO 12100 and the

following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http: //www .electropedia .org/
© ISO 2018 – All rights reserved 1
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SIST EN ISO 19014-1:2018
ISO 19014-1:2018(E)
— ISO Online browsing platform: available at http: //www .iso .org/obp
3.1
Machine Performance Level
MPL

discrete level to specify the ability of safety-related parts of control systems (3.3.2) to perform a safety

function under reasonably foreseeable conditions

Note 1 to entry: The term MPL is used to describe the performance level required from a safety-related part of

a control system. The ‘M’ refers to machine and denotes Earth Moving Machinery covered by the scope of this

document and is used to differentiate from other functional safety standards (e.g. PL, AgPL, ASIL, etc.).

3.1.1
Machine Performance Level required
MPL
discrete level required as determined by processes in this document
3.1.2
Machine Performance Level achieved
MPL

discrete level achieved by the safety control systems (3.3.1) hardware, architecture and software

Note 1 to entry: Process for determination of MPLa will be covered in ISO 19014-2 and ISO 19014-4, under

development.
3.2
functional safety

part of the overall safety relating to the equipment under control and its control system that depends

on the correct functioning of the safety control system (SCS) (3.3.1) and other risk reduction measures

[SOURCE: IEC 61508-4:2010, 3.1.12, modified]
3.3
machine control system
MCS

system which responds to input signals from parts of machine elements, operators (3.4.1), external

control equipment or any combination of these and generates output signals causing the machine to

behave in the intended manner
[SOURCE: ISO 13849-1:2015, 3.1.32]
3.3.1
safety control system
SCS

sub-system or system used by a MCS (3.3) to achieve functional safety (3.2) by affecting machine

behaviour or mitigating a hazard

Note 1 to entry: A system which can fail in a way that creates a hazard is considered a SCS.

Note 2 to entry: For example, SCS for propulsion may include throttle, gear shift, start/stop, etc.

3.3.2
safety-related part of the control system
SRP/CS

part of a SCS (3.3.1) that responds to safety-related input signals and generates safety-related

output signals

Note 1 to entry: The combined safety-related parts of a control system start at the point where the safety-related

input signals are initiated (including, for example, the actuating cam and the roller of the position switch) and

end at the output of the power control elements (including, for example, the main contacts of a contactor).

Note 2 to entry: If monitoring systems are used for diagnostic coverage, they are also considered as SRP/CS.

2 © ISO 2018 – All rights reserved
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SIST EN ISO 19014-1:2018
ISO 19014-1:2018(E)
Note 3 to entry: SRP/CS is a part or component within the specific MCS.
[SOURCE: ISO 13849-1:2015, 3.1.1, modified - Note 3 to entry has been added.]
3.4
person group
groups of people analyzed in the MCSSA (3.14)
3.4.1
operator
person operating the EMM and aware of associated risks or hazards
3.4.2
co-worker
person working in the vicinity of a machine and aware of associated hazards
3.4.3
bystander

person including non-employee, child, or member of the public with little or no awareness of machine

hazards and no training
3.4.4
maintainer
person whose function is to perform maintenance tasks on the machine
Note 1 to entry: A maintainer is trained and familiar with the machine.
3.5
controllability

ability to avoid harm to the person group (3.4) at risk through the timely reactions of the operator

(3.4.1), possibly with the support of alternative controls
3.6
exposure
percentage of time a person group (3.4) is exposed to the hazard

Note 1 to entry: The exposure is the product of the following dependent probabilities: application use case (3.11),

hazard time (3.12), and person group exposure (3.15).
3.7
severity

estimate of the extent of harm to one or more individuals that can occur in a potentially hazardous

situation
[SOURCE: ISO 26262-1:2011, 1.120]
3.8
operation indicator

means by which the state of the equipment or machinery is represented to an observer

[SOURCE: ISO 22555:2007, 3.2]
3.8.1
warning indicator

visual, sensory or audible indications where an action from the operator (3.4.1) or control system is

required
3.8.2
immediate action warning indicator

warning indicator (3.8.1) requiring immediate action from the operator (3.4.1) to mitigate hazard or

system failure
© ISO 2018 – All rights reserved 3
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SIST EN ISO 19014-1:2018
ISO 19014-1:2018(E)
3.9
application

different industries where a machine is used in, that can have different hazardous situations from

one another

Note 1 to entry: Applications can include general construction, road construction, waste management,

quarrying, etc.
3.10
use case
intended use of a machine within an application (3.9)

Note 1 to entry: For example, a dozer can have dozing, ripping, travel and maintenance use cases within an

application.
3.11
application use case

highest percentage of time a machine is anticipated to be used in a use case (3.10) within a given

application (3.9) during the intended use of the life cycle of the machine

Note 1 to entry: Because the application use case represents the highest percentage of time, and not the average,

a machine in the population spends in a use case, the sum of application use cases across an application can be

greater than 100 %.
3.12
hazard time

percentage of time within the work cycle of the application use where it is reasonably foreseeable that a

hazard may exist should the control system being assessed fail

Note 1 to entry: For example, a dozer pushing material off a high wall is only exposed to the hazard of going over

the high wall for the time where the machine is traveling towards the high wall within the stopping distance of

the machine.
3.13
hazard zone

any space within or around machinery in which a person can be exposed to a hazard from the SCS

(3.3.1) under analysis

[SOURCE: ISO 12100:2010 3.11, modified - “from the SCS under analysis” has been added.]

3.14
machine control system safety analysis
MCSSA

risk assessment used to determine the MPLr (3.1.1) for the SCS (3.3.1) on a machine as outlined in this

document
3.15
person group exposure

highest percentage of hazard time (3.12) that someone from the person group (3.4) being assessed is

present in the hazard zone (3.13)

Note 1 to entry: The analysis is a sum of all the persons exposed from the person group, not a single individual

within that group i.e. not a single car driving by, but the flow of traffic.
3.16
failure type
description of the type of failure that can occur in a SCS (3.3.1)

Note 1 to entry: Failure types to consider include failure to apply, failure to release, uncommanded apply,

uncommanded release, incorrect apply rate, incorrect release rate or incorrect direction, etc.

4 © ISO 2018 – All rights reserved
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SIST EN ISO 19014-1:2018
ISO 19014-1:2018(E)
3.17
worst credible

estimation of severity (3.7) of the most severe harm that can realistically occur from a single

hazardous event

Note 1 to entry: Worst credible is not always the worst conceivable or the most likely but it is based on

consideration of incident history and potential outcome of a hazardous events.
4 Method to determine MPLr for SRP/CS of earth moving machinery
4.1 General

Functional safety is achieved by one or more SCS which rely on many technologies (e.g. mechanical,

hydraulic, pneumatic, electrical, electronic, programmable electronic). Any safety strategy shall

consider all of the elements within a SCS, such as sensors, controlling devices and actuators.

Parts of the SCS which provide safety functions are called safety-related parts of control systems (SRP/

CS). These can consist of hardware or software, can be separate or integrated parts of a control system,

that shall be included in the MCSSA process.

The objective is to reduce the risk associated with a given hazard (or hazardous situation) during

intended use of the machine. This shall be achieved by applying various protective measures (both

SRP/CS and non-SRP/CS) with the end-result of achieving a safe condition.

An examination of risk for safety functions is focused on the origin of injuries to people. If in the

analysis of potential harm it can be established that damage is clearly limited to property and does

not involve injury to people, this would not require a MCS to be classified as a SCS. In addition, it is the

responsibility of the user (owner) to perform a specific job site risk assessment and these assessments

are not part of the MCSSA process.
4.2 Machine Control System Safety Analysis (MCSSA) method
a) Identify all MCS or functions for the machine being evaluated.
b) Identify possible failure types for each MCS or functions.
c) Identify risks presented for each failure type of each MCS or functions.

1) If no risks are identified, the MCS or functions is not a SCS but may still be covered by the

requirements for Quality Measure (QM) (see 6.6).

2) If risks are identified, the MCS or functions is a SCS. Continue MCSSA with step d).

d) Evaluate risks

1) Determined above using severity, exposure and controllability assessments using the method

as defined in Clause 6, and continue to step e).

NOTE ISO/TS 19014-5, on Machine Control System Safety Analysis (MCSSA) and performance

levels, is being developed; this document will detail an alternative method to use when determining the

appropriate MPLr for some common MCS’s.

e) Determine MPLr using a risk graph (see Figure 2 in 6.6) for each failure type of each SCS, following

the process in 6.3, 6.4 and 6.5.
1) Select the highest MPLr to assign to that SCS as per 6.6.

f) If MCSSA was completed by function, not system, then assign MPLr to relevant SCS.

g) Use the other parts in the ISO 19014 series to determine the MPLa of the SCS.
© ISO 2018 – All rights reserved 5
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SIST EN ISO 19014-1:2018
ISO 19014-1:2018(E)
h) Ensure MPLa ≥ MPLr.
If additional protective measures are added, they s
...

SLOVENSKI STANDARD
SIST EN ISO 19014-1:2018
01-november-2018

Stroji za zemeljska dela - Funkcijska varnost - 1. del: Metodologija ugotavljanja

delov krmilnega sistema, ki so povezani z varnostjo in zahtevanimi lastnostmi (ISO

19014-1:2018)

Earth-moving machinery - Functional safety - Part 1: Methodology to determine safety-

related parts of the control system and performance requirements (ISO 19014-1:2018)

Engins de terrassement - Sécurité - Partie 1: Méthodologie permettant de déterminer les

parties du système de commande et les exigences de performance liés à la sécurité

(ISO 19014-1:2018)
Ta slovenski standard je istoveten z: EN ISO 19014-1:2018
ICS:
53.100 Stroji za zemeljska dela Earth-moving machinery
SIST EN ISO 19014-1:2018 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 19014-1:2018
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SIST EN ISO 19014-1:2018
EN ISO 19014-1
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2018
EUROPÄISCHE NORM
ICS 53.100
English Version
Earth-moving machinery - Functional safety - Part 1:
Methodology to determine safety-related parts of the
control system and performance requirements (ISO
19014-1:2018)

Engins de terrassement - Sécurité fonctionnelle - Partie Erdbaumaschinen - Funktionale Sicherheit - Teil 1:

1: Méthodologie pour la détermination des parties Methodik zur Bestimmung sicherheitsbezogener Teile

relatives à la sécurité des systèmes de commande et les einer Steuerung und von Leistungsanforderungen (ISO

exigences de performance (ISO 19014-1:2018) 19014-1:2018)
This European Standard was approved by CEN on 23 May 2018.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 19014-1:2018 E

worldwide for CEN national Members.
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SIST EN ISO 19014-1:2018
EN ISO 19014-1:2018 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 19014-1:2018
EN ISO 19014-1:2018 (E)
European foreword

This document (EN ISO 19014-1:2018) has been prepared by Technical Committee ISO/TC 127 "Earth-

moving machinery" in collaboration with Technical Committee CEN/TC 151 “Construction equipment

and building material machines - Safety” the secretariat of which is held by DIN.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by February 2019, and conflicting national standards

shall be withdrawn at the latest by February 2019.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,

France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,

Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
Endorsement notice

The text of ISO 19014-1:2018 has been approved by CEN as EN ISO 19014-1:2018 without any

modification.
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SIST EN ISO 19014-1:2018
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SIST EN ISO 19014-1:2018
INTERNATIONAL ISO
STANDARD 19014-1
First edition
2018-06
Earth-moving machinery —
Functional safety —
Part 1:
Methodology to determine safety-
related parts of the control system and
performance requirements
Engins de terrassement — Sécurité fonctionnelle —
Partie 1: Méthodologie pour la détermination des parties relatives à
la sécurité des systèmes de commande et les exigences de performance
Reference number
ISO 19014-1:2018(E)
ISO 2018
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SIST EN ISO 19014-1:2018
ISO 19014-1:2018(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2018

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
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CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved
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SIST EN ISO 19014-1:2018
ISO 19014-1:2018(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Method to determine MPLr for SRP/CS of earth moving machinery .............................................................5

4.1 General ........................................................................................................................................................................................................... 5

4.2 Machine Control System Safety Analysis (MCSSA) method ............................................................................. 5

5 Requirements for immediate action warning indicators........................................................................................... 6

5.1 General ........................................................................................................................................................................................................... 6

6 Performance level determination procedures ...................................................................................................................... 6

6.1 General ........................................................................................................................................................................................................... 6

6.2 Participants in the risk assessment ...................................................................................................................................... 6

6.3 Assessment and classification of a potential harm .................................................................................................. 6

6.4 Assessment of exposure in the situation observed ................................................................................................. 7

6.5 Assessment of a possibility to avoid harm ...................................................................................................................... 7

6.6 Determining the required MPL ................................................................................................................................................. 9

Annex A (informative) Process flow chart for machinery risk assessment ..............................................................11

Annex B (informative) Table of warning/operation indicators ............................................................................................13

Annex C (informative) Example of MCSSA Process ..............................................................................................................................14

Annex D (informative) List of possible safety control systems (SCS) of earth moving machines .......18

Bibliography .............................................................................................................................................................................................................................20

© ISO 2018 – All rights reserved iii
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SIST EN ISO 19014-1:2018
ISO 19014-1:2018(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso

.org/iso/foreword .html.

This document was prepared by Technical Committee ISO/TC 127, Earth-moving machinery,

Subcommittee SC 2, Safety, ergonomics and general requirements.

This first edition of ISO 19014-1, together with ISO 19014-2, ISO 19014-3, ISO 19014-4 and ISO/

TS 19014-5, cancels and replaces ISO 15998 and ISO/TS 15998-2, which have been technically revised.

The main changes compared to the previous documents are as follows:

— method for determination of performance levels and machine control system safety analysis,

— additional requirements for mobile machines,
— environmental test requirements for components of safety controls systems, and

— requirements for software validation and verification of machine performance levels.

A list of all parts in the ISO 19014-series can be found on the ISO website. At the time of publication of

this document, Part 2, Design and evaluation of safety-related machine control systems, Part 4, Design and

evaluation of software and transmission for safety related parts of the control system, and Part 5, Tables of

performance levels, are under development.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/members .html.
iv © ISO 2018 – All rights reserved
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SIST EN ISO 19014-1:2018
ISO 19014-1:2018(E)
Introduction

This document addresses systems of all energy types used for functional safety in earth-moving

machinery.
The structure of safety standards in the field of machinery is as follows.

Type-A standards (basis standards) give basic concepts, principles for design and general aspects that

can be applied to machinery.

Type-B standards (generic safety standards) deal with one or more safety aspects, or one or more types

of safeguards that can be used across a wide range of machinery:

— type-B1 standards on particular safety aspects (e.g. safety distances, surface temperature, noise);

— type-B2 standards on safeguards (e.g. two-hands controls, interlocking devices, pressure sensitive

devices, guards).

Type-C standards (machinery safety standards) deal with detailed safety requirements for a particular

machine or group of machines.
This document is a type C standard as stated in ISO 12100.

This document is of relevance, in particular, for the following stakeholder groups representing the

market players with regard to machinery safety:
— machine manufacturers (small, medium and large enterprises);

— health and safety bodies (regulators, accident prevention organisations, market surveillance etc.).

Others can be affected by the level of machinery safety achieved with the means of the document by the

above-mentioned stakeholder groups:
— machine users/employers (small, medium and large enterprises);

— machine users/employees (e.g. trade unions, organizations for people with special needs);

— service providers, e. g. for maintenance (small, medium and large enterprises);

The above-mentioned stakeholder groups have been given the possibility to participate at the drafting

process of this document.

The machinery concerned and the extent to which hazards, hazardous situations or hazardous events

are covered are indicated in the Scope of this document.

When requirements of this type-C standard are different from those which are stated in type-A or

type-B standards, the requirements of this type-C standard take precedence over the requirements of

the other standards for machines that have been designed and built according to the requirements of

this type-C standard.
© ISO 2018 – All rights reserved v
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SIST EN ISO 19014-1:2018
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SIST EN ISO 19014-1:2018
INTERNATIONAL STANDARD ISO 19014-1:2018(E)
Earth-moving machinery — Functional safety —
Part 1:
Methodology to determine safety-related parts of the
control system and performance requirements
1 Scope

This document provides a methodology for the determination of performance levels required for earth

moving machinery (EMM) as defined in ISO 6165.

A Machine Control System Safety Analysis (MCSSA) determines the amount of risk reduction of hazards

associated with control systems, required for Safety Control Systems (SCS). This reduction is quantified

by the Machine Performance Level (MPL), the hazards are identified using the risk assessment principles

as defined in ISO 12100 or by other means.

NOTE 1 Step 2 as shown in Annex A demonstrates the relationship between ISO 12100 and ISO 19014 as a

complementary protective measure.

NOTE 2 ISO 19014 can also be used to assess the functional safety requirements of other off-road mobile

machinery.

For those controls determined to be safety-related, the characteristics for architecture, hardware,

software environmental requirements and performance are covered by other parts in ISO 19014.

ISO 19014 covers the hazards caused by the failure of a safety control system and excludes hazards

arising from the equipment itself (for example, electric shock, fire, etc.).

Other controls that are not safety control systems (SCS), that do not mitigate a hazard or perform a

control function and where the operator would be aware of a failure, are excluded from this standard

(e.g. windscreen wipers, head lights, cab light, etc.).
NOTE 3 A list of safety control systems is included in Annex D.

NOTE 4 Audible warnings are excluded from the requirements of diagnostic coverage.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 6165, Earth-moving machinery — Basic types — Identification and terms and definitions

ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 6165 and ISO 12100 and the

following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http: //www .electropedia .org/
© ISO 2018 – All rights reserved 1
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SIST EN ISO 19014-1:2018
ISO 19014-1:2018(E)
— ISO Online browsing platform: available at http: //www .iso .org/obp
3.1
Machine Performance Level
MPL

discrete level to specify the ability of safety-related parts of control systems (3.3.2) to perform a safety

function under reasonably foreseeable conditions

Note 1 to entry: The term MPL is used to describe the performance level required from a safety-related part of

a control system. The ‘M’ refers to machine and denotes Earth Moving Machinery covered by the scope of this

document and is used to differentiate from other functional safety standards (e.g. PL, AgPL, ASIL, etc.).

3.1.1
Machine Performance Level required
MPL
discrete level required as determined by processes in this document
3.1.2
Machine Performance Level achieved
MPL

discrete level achieved by the safety control systems (3.3.1) hardware, architecture and software

Note 1 to entry: Process for determination of MPLa will be covered in ISO 19014-2 and ISO 19014-4, under

development.
3.2
functional safety

part of the overall safety relating to the equipment under control and its control system that depends

on the correct functioning of the safety control system (SCS) (3.3.1) and other risk reduction measures

[SOURCE: IEC 61508-4:2010, 3.1.12, modified]
3.3
machine control system
MCS

system which responds to input signals from parts of machine elements, operators (3.4.1), external

control equipment or any combination of these and generates output signals causing the machine to

behave in the intended manner
[SOURCE: ISO 13849-1:2015, 3.1.32]
3.3.1
safety control system
SCS

sub-system or system used by a MCS (3.3) to achieve functional safety (3.2) by affecting machine

behaviour or mitigating a hazard

Note 1 to entry: A system which can fail in a way that creates a hazard is considered a SCS.

Note 2 to entry: For example, SCS for propulsion may include throttle, gear shift, start/stop, etc.

3.3.2
safety-related part of the control system
SRP/CS

part of a SCS (3.3.1) that responds to safety-related input signals and generates safety-related

output signals

Note 1 to entry: The combined safety-related parts of a control system start at the point where the safety-related

input signals are initiated (including, for example, the actuating cam and the roller of the position switch) and

end at the output of the power control elements (including, for example, the main contacts of a contactor).

Note 2 to entry: If monitoring systems are used for diagnostic coverage, they are also considered as SRP/CS.

2 © ISO 2018 – All rights reserved
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SIST EN ISO 19014-1:2018
ISO 19014-1:2018(E)
Note 3 to entry: SRP/CS is a part or component within the specific MCS.
[SOURCE: ISO 13849-1:2015, 3.1.1, modified - Note 3 to entry has been added.]
3.4
person group
groups of people analyzed in the MCSSA (3.14)
3.4.1
operator
person operating the EMM and aware of associated risks or hazards
3.4.2
co-worker
person working in the vicinity of a machine and aware of associated hazards
3.4.3
bystander

person including non-employee, child, or member of the public with little or no awareness of machine

hazards and no training
3.4.4
maintainer
person whose function is to perform maintenance tasks on the machine
Note 1 to entry: A maintainer is trained and familiar with the machine.
3.5
controllability

ability to avoid harm to the person group (3.4) at risk through the timely reactions of the operator

(3.4.1), possibly with the support of alternative controls
3.6
exposure
percentage of time a person group (3.4) is exposed to the hazard

Note 1 to entry: The exposure is the product of the following dependent probabilities: application use case (3.11),

hazard time (3.12), and person group exposure (3.15).
3.7
severity

estimate of the extent of harm to one or more individuals that can occur in a potentially hazardous

situation
[SOURCE: ISO 26262-1:2011, 1.120]
3.8
operation indicator

means by which the state of the equipment or machinery is represented to an observer

[SOURCE: ISO 22555:2007, 3.2]
3.8.1
warning indicator

visual, sensory or audible indications where an action from the operator (3.4.1) or control system is

required
3.8.2
immediate action warning indicator

warning indicator (3.8.1) requiring immediate action from the operator (3.4.1) to mitigate hazard or

system failure
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SIST EN ISO 19014-1:2018
ISO 19014-1:2018(E)
3.9
application

different industries where a machine is used in, that can have different hazardous situations from

one another

Note 1 to entry: Applications can include general construction, road construction, waste management,

quarrying, etc.
3.10
use case
intended use of a machine within an application (3.9)

Note 1 to entry: For example, a dozer can have dozing, ripping, travel and maintenance use cases within an

application.
3.11
application use case

highest percentage of time a machine is anticipated to be used in a use case (3.10) within a given

application (3.9) during the intended use of the life cycle of the machine

Note 1 to entry: Because the application use case represents the highest percentage of time, and not the average,

a machine in the population spends in a use case, the sum of application use cases across an application can be

greater than 100 %.
3.12
hazard time

percentage of time within the work cycle of the application use where it is reasonably foreseeable that a

hazard may exist should the control system being assessed fail

Note 1 to entry: For example, a dozer pushing material off a high wall is only exposed to the hazard of going over

the high wall for the time where the machine is traveling towards the high wall within the stopping distance of

the machine.
3.13
hazard zone

any space within or around machinery in which a person can be exposed to a hazard from the SCS

(3.3.1) under analysis

[SOURCE: ISO 12100:2010 3.11, modified - “from the SCS under analysis” has been added.]

3.14
machine control system safety analysis
MCSSA

risk assessment used to determine the MPLr (3.1.1) for the SCS (3.3.1) on a machine as outlined in this

document
3.15
person group exposure

highest percentage of hazard time (3.12) that someone from the person group (3.4) being assessed is

present in the hazard zone (3.13)

Note 1 to entry: The analysis is a sum of all the persons exposed from the person group, not a single individual

within that group i.e. not a single car driving by, but the flow of traffic.
3.16
failure type
description of the type of failure that can occur in a SCS (3.3.1)

Note 1 to entry: Failure types to consider include failure to apply, failure to release, uncommanded apply,

uncommanded release, incorrect apply rate, incorrect release rate or incorrect direction, etc.

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SIST EN ISO 19014-1:2018
ISO 19014-1:2018(E)
3.17
worst credible

estimation of severity (3.7) of the most severe harm that can realistically occur from a single

hazardous event

Note 1 to entry: Worst credible is not always the worst conceivable or the most likely but it is based on

consideration of incident history and potential outcome of a hazardous events.
4 Method to determine MPLr for SRP/CS of earth moving machinery
4.1 General

Functional safety is achieved by one or more SCS which rely on many technologies (e.g. mechanical,

hydraulic, pneumatic, electrical, electronic, programmable electronic). Any safety strategy shall

consider all of the elements within a SCS, such as sensors, controlling devices and actuators.

Parts of the SCS which provide safety functions are called safety-related parts of control systems (SRP/

CS). These can consist of hardware or software, can be separate or integrated parts of a control system,

that shall be included in the MCSSA process.

The objective is to reduce the risk associated with a given hazard (or hazardous situation) during

intended use of the machine. This shall be achieved by applying various protective measures (both

SRP/CS and non-SRP/CS) with the end-result of achieving a safe condition.

An examination of risk for safety functions is focused on the origin of injuries to people. If in the

analysis of potential harm it can be established that damage is clearly limited to property and does

not involve injury to people, this would not require a MCS to be classified as a SCS. In addition, it is the

responsibility of the user (owner) to perform a specific job site risk assessment and these assessments

are not part of the MCSSA process.
4.2 Machine Control System Safety Analysis (MCSSA) method
a) Identify all MCS or functions for the machine being evaluated.
b) Identify possible failure types for each MCS or functions.
c) Identify risks presented for each failure type of each MCS or functions.

1) If no risks are identified, the MCS or functions is not a SCS but may still be covered by the

requirements for Quality Measure (QM) (see 6.6).

2) If risks are identified, the MCS or functions is a SCS. Continue MCSSA with step 4.

d) Evaluate risks

1) Determined above using severity, exposure and controllability assessments using the method

as defined in Clause 6, and continue to step 5.

NOTE ISO/TS 19014-5, on Machine Control System Safety Analysis (MCSSA) and performance

levels, is being developed; this document will detail an alternative method to use when determining the

appropriate MPLr for some common MCS’s.

e) Determine MPLr using a risk graph (see Figure 2 in 6.6) for each failure type of each SCS, following

the process in 6.3, 6.4 and 6.5.
1) Select the highest MPLr to assign to that SCS as per 6.6.

f) If MCSSA was completed by function, not system, then assign MPLr to relevant SCS.

g) Use the other parts in the ISO 19014 series to determine the MPLa of the SCS.
© ISO 2018 – All rights reserved 5
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SIST EN ISO 19014-1:2018
ISO 19014-1:2018(E)
h) Ensure MPLa ≥ MPLr.

If additional protective measures are added, they shall meet the MPLr for the SCS to which they relate.

NOTE Annex C provides a worked example of the MCSSA process
5 Requirements for immediate action warning indicators
5.1 General

The principles of this standard should also be applied to immediate action warning indicator intended

to warn the operator of a possible hazard and requiring immediate action from the operator to correct

and prevent such a hazard.

These indicators shall not be designated as meeting a performance level as the output/diagnostic

coverage is reliant on human reaction; indicators provide no control of the system and therefore cannot

be labelled as safety-related parts of the control system.
A review of immediate ac
...

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