ISO 8927:1991

Earth-moving machinery — Machine availability — Vocabulary

Defines the generally recognized terms and definitions relating to the availability of earth-moving machinery (as defined in ISO 6165) to assist in the communication and understanding of such terms. Annex A provides a means of identifying the field of terms to be used and standardized, to clarify the relationships between the terms. The terms are grouped into availability terms, reliability terms, failure terms, serviceability terms, and time terms. Terms are in English and French, alphabetical indexes are given in English and French.

Engins de terrassement — Disponibilité d'un engin — Vocabulaire

General Information

• Status: Published
• Publication Date: 23-Jan-1991
• ICS: 01.040.53 - Materials handling equipment (Vocabularies)
• ICS: 53.100 - Earth-moving machinery
• Technical Committee: ISO/TC 127/SC 3 - Machine characteristics, electrical and electronic systems, operation and maintenance
• Drafting Committee: ISO/TC 127/SC 3 - Machine characteristics, electrical and electronic systems, operation and maintenance
• Current Stage: 9093 - International Standard confirmed
• Due Date: 20-Mar-2025
• Completion Date: 20-Mar-2025

Standards Content (Sample)

First edition
Premiere Edition
1991-02-15
machinery - achine
Earth-mo
awailability - Vocabulary
Engins de terrassement -
engin - Vocabulaire
Reference number
Numero de reference
ISO 8927 : 4991 (E/F)
ISO 8927 : 1991 (E/F)
Contents Page
..............................................................
1 Scope
2 Normative reference .
.................................................
3 Terms and definitions
3.1 General terms .
3.2 Availability terms .
3.3 Reliability terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 Failure terms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Serviceability terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5
3.6 Timeterms.
Relationships between terms relating to machine availability of
Annex A
earth-moving machinery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Alphabetical indexes
English . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
French . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
0 ISO 1991
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Printed in Switzerland/lmprime en Suisse
ii
ISO8927 : 1991 (E/F)
Sommaire Page
1 Domaine d’application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2 Reference normative. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3 Termes et definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 Termes genhaux
................................................ 1
3.2 Termes relatifs 3 Ia disponibilitk
.................................... 1
3.3 Termes relatifs 3 Ia fiabilite
........................................ 2
3.4 Termes relatifs aux dhfaillances
.................................... 3
3.5 Termes relatifs ZI I’aptitude 2 I’emploi
............................... 5
3.6 Termesrelatifsautempsethladuree. .
Annexe A Relations entre les termes relatifs a Ia disponibilith des engins de
terrassement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Index alphabetiques
Anglais.;. 18
Francais . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
,
ISO 8927 : 1991 (E/F)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of
national Standards bodies (ISO member bedies). The work of preparing International
Standards is normally carried out through ISO technical committees. Esch 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, govern-
mental 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.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for voting. Publication as an International Standard requires
approval by at least 75 % of the member bodies casting a vote.
International Standard ISO 8927 was prepared by Technical Committee ISO/TC 127,
Earth-moving machinery, Sub-Committee SC 3, Operation and maintenance.
Annex A of this International Standard is for information only.

ISO8927 : 1991 (E/F)
Avant-propos
L’ISO (Organisation internationale de normalisation) est une federation mondiale
d’organismes nationaux de normalisation (comites membres de I’ISO). L’elaboration
des Normes internationales est en general confiee aux comites techniques de I’ISO.
Chaque comite membre interesse par une etude a Ie droit de faire Partie du comite
technique cr-66 a cet effet. Les organisations internationales, gouvernementales et non
gouvernementales, en liaison avec I’ISO participent egalement aux travaux. L’ISO col-
labore etroitement avec Ia Commission electrotechnique internationale (GEI) en ce qui
concerne Ia normalisation electrotechnique.
Les projets de Normes internationales adoptes par les comites techniques sont soumis
aux comites membres pour vote. Leur publication comme Normes internationales
requiert I’approbation de 75 % au moins des comites membres votants.
La Norme internationale ISO 8927 a et6 elaboree par Ie comite technique ISO/TC 127,
Engins de terrassement, sous-comite SC 3, Emploi et entretien.
L’annexe A de Ia presente Norme internationale est donnee uniquement a titre d’infor-
mation.
V
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INTERNATIONAL STANDARD
ISO 8927 : 1991 (E/F)
NORME INTERNATIONALE
Earth-moving machinery - Engins de terrassement -
Disponibilite d’un engin -
Machine availability -
Vocabulaire
Vocabulary
1 Domaine d’application
1 Scope
La presente Norme internationale definit les termes relatifs a Ia
This International Standard defines the generally recognized
terms and definitions relating to the availability of earth-moving disponibilite des engins de terrassement afin de faciliter les
communications.
machinery to assist in the communication and understanding of
such terms.
Elle est applicable aux engins de terrassement tels que definis
lt applies to earth-moving machinery as defined in ISO 6165. dans I’ISO 6165.
L’annexe A fournit un moyen d’identifier Ia terminologie a uti-
Annex A provides a means of identifying the field of terms to be
liser et a normaliser afin de clarifier les relations entre les diffe-
used and standardized, to clarify the relationships between the
rents termes.
terms.
2 Reference normative
2 Normative reference
La norme suivante contient des dispositions qui, par Suite de Ia
The following Standard contains provisions which, through
reference in this text, constitute provisions of this International reference qui en est faite, constituent des dispositions valables
pour Ia presente Norme internationale. Au moment de Ia
Standard. At the time of publication, the edition indicated was
valid. All Standards are subject to revision, and Parties to publication, I’edition indiquee etait en vigueur. Toute norme est
sujette a revision et les Parties prenantes des accords fondes
agreements based on this International Standard areencouraged
to investigate the possibility of applying the most recent edition sur Ia presente Norme internationale sont invitees a rechercher
Ia possibilite d’appliquer I’edition Ia plus recente de Ia norme in-
of the Standard indicated below. Members of IEC and ISO
maintain registers of currently valid International Standards. diquee ci-apres. Les membres de Ia CEI et de I’ISO possedent Ie
registre des Normes internationales en vigueur a un moment
ISO 6165 : 1987, Earth-moving machinery - Basic types - donne.
Vocabulary.
ISO 6165 : 1987, Engins de terrassement - Principaux types -
Vocabulaire.
3 Termes et definitions
3 Terms and definitions
3.1 Termes gh5raux
3.1 General terms
3.1.1 item : Either a general term or an individual term which 3.1.1 Mment: Terme general ou terme individuel qui fait
I’objet des preoccupations au niveau disponibilite et fiabilite.
is the Object of availability and reliability considerations.
3.2 Termes relatifs ti Ia disponibilite
3.2 Availability terms
3.2.1 availability: Probability of a repairable item being 3.2.1 disponibilit6 : Probabilite pour qu’un element reparable
operable when it is required to operate. Availability is the total soit operationnel au moment ou il doit etre mis en Service. La
characteristics of reliability, serviceability and accessibility of disponibilite est I’ensemble des caracteristiques de fiabilite,
the item. Availability tan be detailed as instantaneous avail- d’aptitude a I’emploi et d’accessibilite de I’element. La disponi-
ability and mean availability. bilite peut etre decomposee en disponibilite instantanee et en
disponibilite moyenne.
ISO 8927 : 1991 (E/F)
3.2.2 instantaneous availabi lity : Proba bility of a repairable 3.2.2 disponibilite instantanee : Probabilite pour qu’un
item maintaining its function at iven or specif ied moment. element reparable maintienne sa fonction a un moment donne
ag
ou a un moment specifie.
3.2.3 disponibilite moyenne: Rapport du cumul du temps
3.2.3 mean availability: Ratio of the total accumulated time
an item has been in Operation to the total time it could have qu’un element a etc en Service a Ia duree totale que celui-ci
been in Operation if it operated continuously. Mean availability aurait pu etre en Service s’il avait fonctionne en continu. La dis-
tan be detailed as inherent availability and operational avail- ponibilite moyenne peut etre decomposee en disponibilite inhe-
rente et en disponibilite operationnelle.
a bility.
3.2.4 inherent availability : Measure of mean availability; 3.2.4 disponibilite inherente : Mesure de Ia disponibilite
the inherent availability, Ai, is calculated as shown in the fol- moyenne; Ia disponibilite inherente, Di, est donnee par Ia for-
lowing formula : mule
TMED
MTBF
Ai = Di =
MTBF + MTTR TMED + TMR
where OU
MTBF is the mean time between failures (3.6.28); TMED est Ie temps moyen entre defaillances (3.6.28);
TMR est Ie temps moyen de reparation (3.6.13).
MTTR is the mean time to repair (3.6.13).
3.2.5 operational availability : Measure of mean availability; 3.2.5 disponibilite operationnelle : Mesure de Ia disponibi-
the operational availability, A,, is calculated as shown in the lite moyenne; Ia disponibilite operationnelle, D,, est donnee
following formula : par Ia formule
MUT TMD
A, = D, =
MUT + MDT TMD + TMI
OU
TMD est Ie temps moyen de disponibilite (3.6.3);
MUT is the mean up time (3.6.3);
TMI est Ie temps moyen d’indisponibilite (3.6.8).
MDT is the mean down time (3.6.8).
3.2.6 aptitude au stockage: Caracteristiques essentielles
3.2.6 storage-ability : Property of an item which preserves its
reliability, life and serviceability during its storage or shipping. d’un element lui permettant de conserver sa fiabilite, sa duree
de vie et son aptitude a I’emploi au cours de son stockage ou de
son expedition.
3.3 Reliability terms 3.3 Termes relatifs ti Ia fiabilith
3.3.1 fiabilite: Probabilite pour qu’un element remplisse une
3.3.1 reliability: Proability that an item will perform a required
fonction requise dans des conditions definies et Pendant une
function under stated conditions for a stated period of time.
Periode definie.
3.3.2 i nherent reliability : Reliability produced in an item 3.3.2 fiabilite inherente: Fiabilite creee dans I’element lui-
meme lors de Ia conception, de Ia fabrication et des essais de
itself at design, manufacturing and reliability testing stages.
fiabilite.
3.3.3 operational reliability: Reliability affected by con- 3.3.3 fiabilite operationnelle: Fiabilite affectee par les con-
ditions d’emploi et d’entretien d’un engin. La relation a Ia fiabi-
ditions of use and Service of a machine. The relation to inherent
reliability tan be shown by the following formula: lite inherente est donnee par Ia formule
R, = Ri X k
= Ri X k
Ro
OU
R, est Ia fiabilite operationnelle;
R, is the operational reliability;
Ri est Ia fiabilite inherente (3.3.2);
Ri is the inherent reliability (3.3.2);
k is the condition factor (normally k < 1). k est Ie facteur de condition (en general k < 1).
ISO 8927 : 1991 (E/F)
fiabilite : Mesure exprimer
Measure to express quan- 3.3.4 caracteristiques de pour
3.3.4 reliability characteristics :
quantitativement Ia fiabilite d ‘un element.
titatively the reliability of an item.
Les caracteristiques de fiabilite, de frequence de defaillance,
NOTE - Reliability, failure rate, mean life and MTBF characteristics NOTE -
de duree de vie moyenne et de temps moyen entre defaillances sont
are used.
utiiisees.
3.4 Termes relatifs aux defaillances
3.4 Failure terms
3.4.1 failure : Actual item which does not per- 3.4.1 defaillance : Etat effectif d’un element qui fait que
condition of an
form its specified func tion under the specified condition. celui-ci n’est pas en mesure de remplir sa fonction specifiee
dans les conditions specifiees.
3.4.2 failure mode: Classification of the observed effect of a 3.4.2 mode de defaillance: Classification de I’effet constate
d’une defaillance, par exemple coupure, tourt-circuit, rupture,
failure, for example, disconnection, short circuit, breakage,
wear-out, degradation of characteristics, etc. usure, degradation des caracteristiques, etc.
3.4.3 defaillance precoce : Defaillance que I’on peut attri-
3.4.3 early failure: Failure attributable to design, manufac-
buer a Ia conception, a Ia fabrication ou a I’emploi incorrect
ture and improper use of an item that occurs during the war-
d’un element et qui se produit Pendant Ia Periode de garantie
ranty time period stated by the manufacturer.
donnee par Ie fabricant.
failure : Failure which occurs at ra ndom be- 3.4.4 defaillance aleatoire: Defaillance qui se produit alea-
3.4.4 ran dom
toirement entre Ia Periode des defaillances precoces et Ia
tween the early failure period an d the wear-out failu re period.
Periode des defaillances par usure.
3.4.5 wear-out failure : Failure which occurs as a result of 3.4.5 defaillance par usure : Defaillance qui
...