Building Information Modelling - Level of Information Need - Part 1: Concepts and principles

This document specifies concepts and principles to establish a methodology for specifying level of information need and information deliveries in a consistent way when using building information modelling (BIM).
This document specifies the characteristics of different levels used for defining the detail and extent of information required to be exchanged and delivered throughout the life cycle of built assets. It gives guidelines for principles required to specify information needs.
The concepts and principles in this document can be applied for a general information exchange and whilst in progress, for a generally agreed way of information exchange between parties in a collaborative work process, as well as for an appointment with specified information delivery.
The level of information need provides methods for describing information to be exchanged according to exchange information requirements. The exchange information requirements specify the wanted information exchange. The result of this process is an information delivery.
This document is applicable to the whole life cycle of any built asset, including strategic planning, initial design, engineering, development, documentation and construction, day-to-day operation, maintenance, refurbishment, repair and end-of-life.

Bauwerksinformationsmodellierung - Informationsbedarfstiefe - Teil 1: Konzepte und Grundsätze

Dieses Dokument legt Konzepte und Grundsätze fest, um eine Methodik für die Festlegung der Informationsbedarfstiefe und von Informationsbereitstellungen für die Anwendung von Building Information Modeling (BIM) in einer konsistenten Weise aufzustellen.
Dieses Dokument legt die Ausprägung verschiedener Stufen fest, die bei der Definition der Detaillierung und des Umfangs von Informationen angewendet werden, die über den gesamten Lebenszyklus von Bauwerken ausgetauscht und geliefert werden müssen. Es gibt Leitlinien für Grundsätze, die für die Festlegung des Informationsbedarfs erforderlich sind.
Die Konzepte und Grundsätze in diesem Dokument können für den allgemeinen Informationsaustausch angewendet werden und sorgen für eine im Allgemeinen vereinbarte Weise des Informationsaustauschs zwischen den Parteien in einem kollaborativen Arbeitsprozess sowie für eine vertraglich festgelegte Informationsbereitstellung.
Die Informationsbedarfstiefe bietet Methoden, um die auszutauschenden Informationen in Übereinstimmung mit den Austausch-Informationsanforderungen zu beschreiben. Die Austausch-Informationsanforderungen legen den gewünschten Informationsaustausch fest. Das Ergebnis dieses Prozesses ist eine Informationsbereitstellung.
Dieses Dokument gilt während des gesamten Lebenszyklus eines Gebäudes, einschließlich der strategischen Planung, des Erstentwurfs, der Ingenieurtechnik, der Entwicklung, der Dokumentation und der Konstruktion, des Betriebs im Alltag, der Instandhaltung, der Modernisierung, der Instandsetzung und des Lebensdauerendes.

Modélisation des informations de la construction - Niveau du besoin d’information - Partie 1 : Concepts et principes

Le présent document spécifie les concepts et les principes permettant d’établir une méthodologie de spécification cohérente du niveau du besoin d’information et des livraisons d’information à l’aide de la modélisation des informations de la construction (BIM).
Le présent document spécifie les caractéristiques des différents niveaux utilisés pour définir le détail et l’étendue des informations qu’il est nécessaire d’échanger et de livrer tout au long du cycle de vie des actifs bâtis. Il donne des lignes directrices sur les principes requis pour spécifier les besoins d’information.
Les concepts et les principes énoncés dans le présent document peuvent s’appliquer à un échange général d’informations et, dans le même temps, à un mode communément accepté d’échange d’informations entre des parties dans le cadre d’un processus de travail collaboratif, ainsi qu’à une désignation accompagnée d’une livraison d’informations spécifiée.
Le niveau du besoin d’information fournit des méthodes pour décrire les informations à échanger conformément aux exigences d’échange d’informations. Les exigences d’échange d’informations spécifient l’échange d’informations souhaité. Le résultat de ce processus est une livraison d’informations.
Le présent document s’applique à la totalité du cycle de vie d’un actif bâti, y compris la planification stratégique, la conception initiale, l’ingénierie, le développement, la documentation et la construction, l’exploitation quotidienne, la maintenance, la réhabilitation, la réparation et la fin de vie.

Informacijsko modeliranje gradenj - Raven informacijskih potreb - 1. del: Pojmi in načela

General Information

Status
Published
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
18-Nov-2020
Completion Date
18-Nov-2020

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SLOVENSKI STANDARD
SIST EN 17412-1:2021
01-februar-2021

Informacijsko modeliranje gradenj - Raven informacijskih potreb - 1. del: Pojmi in

načela

Building Information Modelling - Level of Information Need - Part 1: Concepts and

principles

Modélisation des Informations pour la Construction (BIM) - Niveau d’Information Requis -

Concepts et Principes
Ta slovenski standard je istoveten z: EN 17412-1:2020
ICS:
35.240.67 Uporabniške rešitve IT v IT applications in building
gradbeništvu and construction industry
91.010.01 Gradbeništvo na splošno Construction industry in
general
SIST EN 17412-1:2021 en,fr,de

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

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SIST EN 17412-1:2021
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SIST EN 17412-1:2021
EN 17412-1
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2020
EUROPÄISCHE NORM
ICS 35.240.67
English Version
Building Information Modelling - Level of Information
Need - Part 1: Concepts and principles

Modélisation des informations de la construction - Building Information Modelling -

Niveau du besoin d'information - Partie 1 : Concepts et Informationsbedarfstiefe - Konzepte und Definitionen

principes
This European Standard was approved by CEN on 18 October 2020.

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

Poland, Portugal, Republic of North Macedonia, 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

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 17412-1:2020 E

worldwide for CEN national Members.
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SIST EN 17412-1:2021
EN 17412-1:2020 (E)

Contents Page

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

Introduction .................................................................................................................................................................... 4

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 5

3 Terms and definitions ................................................................................................................................... 5

4 General................................................................................................................................................................ 8

5 Framework to specify the level of information need ......................................................................... 8

5.1 General................................................................................................................................................................ 8

5.2 Consider the purposes .................................................................................................................................. 8

5.3 Consider the information delivery milestones .................................................................................... 9

5.4 Consider the actors ........................................................................................................................................ 9

5.5 Consider the objects within a breakdown structure.......................................................................... 9

6 Definition of level of information need and its subdivision .......................................................... 10

6.1 General.............................................................................................................................................................. 10

6.2 Geometrical information ............................................................................................................................ 11

6.2.1 General.............................................................................................................................................................. 11

6.2.2 Detail ................................................................................................................................................................. 11

6.2.3 Dimensionality ............................................................................................................................................... 13

6.2.4 Location ............................................................................................................................................................ 14

6.2.5 Appearance ..................................................................................................................................................... 14

6.2.6 Parametric behaviour ................................................................................................................................. 15

6.2.7 Relationships of aspects of geometrical information and prerequisites ................................. 16

6.3 Alphanumerical information .................................................................................................................... 16

6.3.1 General.............................................................................................................................................................. 16

6.3.2 Identification .................................................................................................................................................. 17

6.3.3 Information content ..................................................................................................................................... 17

6.4 Documentation .............................................................................................................................................. 17

6.5 Relationship diagram on level of information need ........................................................................ 18

7 Verification and validation ........................................................................................................................ 19

Annex A (informative) Overview of the main concepts related to information exchange .............. 20

Annex B (informative) Example of method to specify level of information need ............................... 21

Bibliography ................................................................................................................................................................. 25

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SIST EN 17412-1:2021
EN 17412-1:2020 (E)
European foreword

This document (EN 17412-1:2020) has been prepared by Technical Committee CEN/TC 442 “Building

Information Modelling (BIM)”, the secretariat of which is held by SN.

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 May 2021, and conflicting national standards shall be

withdrawn at the latest by May 2021.

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 organisations of the

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

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
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SIST EN 17412-1:2021
EN 17412-1:2020 (E)
Introduction

This document sets out the concepts and principles for defining the level of information need and

information deliveries being part of the information exchange processes during the life cycle of built

assets when using building information modelling (BIM). Those concepts and principles can deliver

clear benefits to all participants in the various life cycle phases of built assets as they provide a common

understanding on the right level of information needed at a certain time. One purpose of defining the

level of information need is to prevent delivery of too much information. Information exchange should

ensure the right information to be delivered for the agreed purpose to facilitate verification and

validation processes.

This document provides methods for describing information to be exchanged according to exchange

information requirements. The exchange information requirements specify the wanted information

exchange. The result of this process is an information delivery.

There is a need that these concepts and principles are described in a common and comparable way to

allow services related to building information modelling to be procured and offered on a European

scale. The need has arisen by the fact that there are several conflicting terms, concepts and usages in

place, both internationally and across Europe, that hinder the objective of having a common

understanding and practise in describing the level of information need for a common European market.

It is therefore helpful not to use an acronym to refer to level of information need as this can

oversimplify these concepts.

The concepts and principles contained in this document are aimed at all those involved in the asset life

cycle. This includes, but is not limited to, the asset owner/operator, the client, the asset manager, the

design team, the construction team, an equipment manufacturer, a technical specialist, a regulatory

authority, an investor, an insurer and an end-user.

The information exchange, as well as related topics such as the exchange information requirements and

the information delivery are defined and explained in context of two related standards:

EN ISO 19650-1, Organization and digitization of information about buildings and civil engineering

works, including building information modelling (BIM) — Information management using building

information modelling — Part 1: Concepts and principles; and

EN ISO 29481-1, Building information models — Information delivery manual — Part 1: Methodology and

format.
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SIST EN 17412-1:2021
EN 17412-1:2020 (E)
1 Scope

This document specifies concepts and principles to establish a methodology for specifying level of

information need and information deliveries in a consistent way when using building information

modelling (BIM).

This document specifies the characteristics of different levels used for defining the detail and extent of

information required to be exchanged and delivered throughout the life cycle of built assets. It gives

guidelines for principles required to specify information needs.

The concepts and principles in this document can be applied for a general information exchange and

whilst in progress, for a generally agreed way of information exchange between parties in a

collaborative work process, as well as for an appointment with specified information delivery.

The level of information need provides methods for describing information to be exchanged according

to exchange information requirements. The exchange information requirements specify the wanted

information exchange. The result of this process is an information delivery.

This document is applicable to the whole life cycle of any built asset, including strategic planning, initial

design, engineering, development, documentation and construction, day-to-day operation, maintenance,

refurbishment, repair and end-of-life.
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.

EN ISO 29481-1:2017, Building information models —Information delivery manual — Part 1:

Methodology and format (ISO 29481-1:2016)

ISO 6707-1, Buildings and civil engineering works — Vocabulary — Part 1: General terms

3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN ISO 29481-1:2017, ISO 6707-1

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 Online browsing platform: available at https://www.iso.org/obp
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SIST EN 17412-1:2021
EN 17412-1:2020 (E)
3.1
information container

named persistent set of information (3.11) retrievable from within a file, system or application storage

hierarchy

EXAMPLE Including sub-directory, information file (including model, document, table, schedule), or distinct

sub-set of an information file such as a chapter or section, layer or symbol.

Note 1 to entry: Persistent information exists over a timescale long enough for it to have to be managed, i.e. this

excludes transient information such as internet search results.

Note 2 to entry: Naming of an information container should be according to an agreed naming convention.

[SOURCE: EN ISO 19650-1:2018, 3.3.12 modified — cross reference has been adapted to be consistent

with internal numbering system. Note 1 has been removed and Notes 2 and 3 have been renumbered]

3.2
information delivery milestone
scheduled event for a predefined information exchange
[SOURCE: EN ISO 19650-2:2018, 3.1.3.2]
3.3
information exchange, verb
act of satisfying an information requirement or part thereof

[SOURCE: EN ISO 19650-1:2018, 3.3.7 modified — cross reference related to “information requirement”

has been removed]
3.4
information model
set of structured and unstructured information containers (3.1)

[SOURCE: EN ISO 19650-1:2018, 3.3.8 modified — cross reference has been adapted to be consistent

with internal numbering system]
3.5
level of information need
framework which defines the extent and granularity of information (3.11)

Note 1 to entry: One purpose of defining the level of information need is to prevent delivery of too much

information.

[SOURCE: EN ISO 19650-1:2018, 3.3.16 modified — cross reference has been adapted to be consistent

with internal numbering system]
3.6
verification

confirmation, through the provision of objective evidence, that specified requirements have been

fulfilled

[SOURCE: EN ISO 9000:2015, 3.8.12 modified — Notes 1 to 3 and cross references have been removed]

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SIST EN 17412-1:2021
EN 17412-1:2020 (E)
3.7
validation

confirmation, through the provision of objective evidence, that the requirements for a specific intended

use or application have been fulfilled

[SOURCE: EN ISO 9000:2015, 3.8.13 modified — Notes 1 to 3 and cross references have been removed]

3.8
breakdown structure
decomposition of a defined scope into progressive levels

[SOURCE: ISO 21511:2018, 3.13 modified — “work” has been deleted in the term, “scope of the project

or programme” replaced with “scope”, “progressively lower levels consisting of elements of work”

replaced with “progressive levels”]
3.9
object
any part of the perceivable or conceivable world
[SOURCE: ISO 12006-2:2015, 3.1.1 modified — Note 1 has been removed]
3.10
geometry
information regarding shape and location of an object

[SOURCE: ISO/IEC 13249-3:2016, 3.1.2.27 modified — “information regarding” has been added,

“geographic location” replaced with “location”, “feature” replaced with “object”]

3.11
information
meaningful data
[SOURCE: EN ISO 9000:2015, 3.8.2 modified — cross reference has been removed]
3.12
geometrical information

description of detail and extent of information that can be expressed using shape, size, dimension, and

location
3.13
alphanumerical information

description of detail and extent of information that can be expressed using characters, digits and

symbols or tokens such as mathematical symbols and punctuation marks
3.14
documentation
collection of documents related to a given subject
[SOURCE: EN 62023:2012, 3.2.3 modified — Notes to entry 1 to 4 deleted]
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SIST EN 17412-1:2021
EN 17412-1:2020 (E)
4 General
To support information exchange, level of information need should be used.

The level of information need describes the granularity of information exchanged in terms of

geometrical information, alphanumerical information and documentation. Different purposes have

their own needs of geometrical information, alphanumerical information and documentation.

The level of information need should be used to discuss and agree on the information delivery between

two or more actors.

The level of information need describes information requirements that can be human and machine

interpretable.
5 Framework to specify the level of information need
5.1 General

To specify the level of information need and how information is going to be delivered the following

useful prerequisites shall be considered:
— purposes for the use of the information to be delivered;
— information delivery milestones for the delivery of the information;

— actors who are going to request and actors who are going to deliver the information;

— objects organized in one or more breakdown structures.

The specification of level of information need is informed by but does not include the listed

prerequisites.

See Annex A for more information related to the relationships between EN ISO 29481-1 and level of

information need.
5.2 Consider the purposes

When the level of information need is specified, the purposes for information delivery shall be

considered.

The purposes should be specified to clarify why the information is needed. The level of information

need should be used for the purposes it has been required for.
The level of information need does not specify the purposes.

To achieve the same purpose, the geometrical information, alphanumerical information and

documentation can vary for different objects.

EXAMPLE 1 To perform an accessibility analysis, requirements such as the clear opening width of a door, its

location, the position and shape of the handle are needed. Other properties, such as the name of the manufacturer

and the acquisition cost, are not relevant to fulfil the purpose. On the other hand, for cost analysis purpose, the

acquisition cost of a door is needed, but the appearance of the handle is not relevant. For rendering purpose, the

geometrical appearance of a door is relevant, while the name of the manufacturer and the acquisition cost are not.

During an information delivery milestone, the same level of information need required for an object can

be used for different purposes.

EXAMPLE 2 In concept design, the same geometry and information of a block can be used for clash detection

and quantity take off.
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SIST EN 17412-1:2021
EN 17412-1:2020 (E)

In some cases, the purpose should not be explicit to all actors (e.g. for security reasons). In those cases,

the purpose should be considered as “not disclosed” and only authorized actors should be informed.

EXAMPLE 3 The purposes can be extracted from organizational information requirements, project information

requirements and asset information requirements as described in EN ISO 19650-1:2018 5.2, 5.3, 5.4 and

EN ISO 19650-2:2018, 5.1.2.
5.3 Consider the information delivery milestones

When the level of information need is specified, information delivery milestones shall be considered.

The information delivery milestones should be specified to clarify when the information is needed.

The level of information need does not specify the information delivery milestones.

At the same information delivery milestone, the geometrical information, alphanumerical information

and documentation can vary for different objects.

EXAMPLE 1 To do accessibility analysis, usually the same level of information need is required at different

milestones.

EXAMPLE 2 To do energy analysis, different level of information need is required at different milestones.

5.4 Consider the actors

When the level of information need is specified, actors who require and deliver the information shall be

considered.
The level of information need does not specify the actor.

EXAMPLE 1 The same level of information need can be required by different actors at the same milestone to

fulfil different purposes.

EXAMPLE 2 Different level of information need can be required by different actors at the same milestone to

fulfil the same purpose.

NOTE 1 At different milestones, e.g. especially in the early phase, the actor responsible of delivering specified

level of information need might not be specified.

EXAMPLE 3 A client might ask for a specific level of information need for an object at an agreed information

delivery milestone without specifying who needs to deliver it. In this case the supply chain is free to assign

responsibilities as preferred.

NOTE 2 Different actors can be responsible for different level of information need at the same information

delivery milestone to fulfil the same purpose.

NOTE 3 For design purposes, at an agreed information delivery milestone, a wall in a project can be made up of

a structural element, architectural cladding and an air duct penetration with an air duct passing through the

penetration. Mechanical, electrical and plumbing engineers are responsible for providing reliable information

concerning the sizing of the duct and associated desired penetration sizing so that the structural and architectural

teams can continue their work to respectively validate the wall structure and cladding design.

5.5 Consider the objects within a breakdown structure

When the level of information need is specified, the objects within a breakdown structure for the

information delivery shall be considered.

The level of information need does not specify the objects within a breakdown structure.

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SIST EN 17412-1:2021
EN 17412-1:2020 (E)

To be able to specify the level of information need, one or more objects within a breakdown structure

should be specified, identifying the semantic, functional and/or spatial decomposition of the project

into objects (e.g. construction elements and spaces are identified).
NOTE 1 Based on the purpose, the level of information need can be related to:

1) Construction results (spaces, construction complexes, construction entities and construction

elements);

2) Construction information (information model, building model, specification, documentation, diagram).

NOTE 2 Breakdown structures can follow a classification system, systems engineering principles or a

federation strategy.

NOTE 3 Different purposes can require different breakdown structures and derived decompositions.

EXAMPLE 1 To fulfil the purpose of cost estimation during the construction phase, a breakdown structure can

be different from a breakdown structure required for scheduling.
6 Definition of level of information need and its subdivision
6.1 General

The level of information need is the framework which defines the extent and granularity of information

to be exchanged. In accordance with this standard the level of information need should be described by

different concepts: geometrical information, alphanumerical information and documentation.

The level of information need can be answered by a combination of geometrical information,

alphanumerical information and/or documentation (see Annex B).

Information contained within documentation, geometrical information and alphanumerical information

can overlap and/or be contradictory, which can create consistency problems within the information

model. A clear hierarchy of the information provided within different information containers should

then be established.

Level of information need can either be predefined or can be defined for a particular information

delivery.

NOTE 1 A predefined level of information need can be included in regulations, standards, plans of work,

recommendations or specific project requirements; while other level of information need can be project specific.

If an aspect of level of information need is not relevant, ‘not applicable’ can be used.

EXAMPLE 1 For building permission purpose during the briefing, the geometrical information and

alphanumerical information can be ‘not applicable’ if only documentation is required.

The level of information need identifies the wanted presence of geometrical information,

alphanumerical information and/or documentation to address a specific purpose at a specified

information delivery milestone or agreed date.

The aspects of level of information need for all identified objects at specific information delivery

milestones should be combined to ensure that all identified purposes are met. This implies that

geometrical information, alphanumerical information or documentation to be delivered for certain

objects can be higher than what is strictly required for one particular identified purpose, because it is

required by another identified purpose at the same information delivery milestone.

The status, tolerance, accuracy and reliability associated to the aspects of level of information need shall

be considered to be managed through metadata.
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SIST EN 17412-1:2021
EN 17412-1:2020 (E)

NOTE 2 Metadata are initially indicated by its author and then amended by the following approval and

authorization processes. ISO 19650-1 describes the use of metadata of information containers. In this document

the use of metadata is related to the specified geometrical information, alphanumerical information and/or

documentation associated to objects.
6.2 Geometrical information
6.2.1 General

To specify the geometrical information of an object or a set of objects, the following independent

aspects should be specified:
— Detail;
— Dimensionality;
— Location;
— Appearance;
— Parametric behaviour.

NOTE 1 Figure 1 to Figure 7 illustrate the existence of the variation in a continuum within one aspect.

NOTE 2 Geometrical information contains several aspects from current different industry practices elaborating

upon existing terms such as level of detail and level of geometry.
6.2.2 Detail

Detail as an aspect of geometrical information describes the complexity of the object geometry

compared to the real-world object. This is a continuum ranging from simplified to detailed.

More refined geometric representations can contain more features, and/or be more decomposed,

thereby being a better approximation of the shape of the real-world object.

EXAMPLE 1 In a project, the detail of the door can be different, depending on the required purpose and/or

information delivery milestones. In early design, the door can be represented as a hole in the wall to support

structural analysis (A) or with a simplified box representing the door panel for asset management during

operation (B). Higher detail adds the different components, such as the threshold and casing for clash detection

(C), or even the door handle and glazing for visualization (D) (Figure 1).

Figure 1 — Example of the concept of “continuum” associated to the detail of a door

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SIST EN 17412-1:2021
EN 17412-1:2020 (E)

EXAMPLE 2 For facility management purposes the detail of a boiler can be simplified and reduced to a box

including the volume of the operational space.

EXAMPLE 3 For clash detection purpose the detail of a boiler can be simplified and reduced to its outer shell.

EXAMPLE 4 For visualization purpose the detail of a boiler can use the detailed geometry from the

manufacturer.

EXAMPLE 5 For 2D drawing production the detail of a door can be different based on the information delivery

...

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