EN ISO 21351:2005
(Main)Space systems - Functional and technical specifications (ISO/FDIS 21351:2004)
Space systems - Functional and technical specifications (ISO/FDIS 21351:2004)
ISO 21351:2005 provides an overview of the respective purposes and positions of functional and technical specifications, their required contents, and the process for developing these documents.
ISO 21351:2005 is applicable to all types of space systems, all product elements, and projects.
Raumfahrtsysteme - Funktionale und technische Spezifikationen (ISO 21351:2005)
Dieses Dokument enthält eine Übersicht über die jeweiligen Ziele und Positionen von funktionalen und technischen Spezifikationen und legt Anforderungen an die Gestaltung und den Inhalt dieser Spezifikationen fest.
Dieses Dokument gilt für alle Arten von Raumfahrtsystemen, -projekten und -produkten.
Systèmes spatiaux - Cahier des charges fonctionnel et spécification technique de besoin (ISO/FDIS 21351:2004)
L'ISO 21351:2005 propose une vue d'ensemble des rôles et positions respectives du cahier des charges fonctionnel et de la spécification technique de besoin, et décrit les exigences relatives à leur contenu ainsi que leur processus de développement.
L'ISO 21351:2005 est applicable à tous les types de systèmes, projets et produits spatiaux.
Vesoljski sistemi – Funkcionalne in tehnične specifikacije (ISO 21351:2005)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2005
9HVROMVNLVLVWHPL±)XQNFLRQDOQHLQWHKQLþQHVSHFLILNDFLMH ,62
Space systems - Functional and technical specifications (ISO 21351:2005)
Raumfahrtsysteme - Funktionale und technische Spezifikationen (ISO 21351:2005)
Systemes spatiaux - Cahier des charges fonctionnel et spécification technique de besoin
(ISO 21351:2005)
Ta slovenski standard je istoveten z: EN ISO 21351:2005
ICS:
49.140 Vesoljski sistemi in operacije Space systems and
operations
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 21351
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2005
ICS 49.140
English version
Space systems - Functional and technical specifications (ISO
21351:2005)
Systèmes spatiaux - Cahier des charges fonctionnel et Raumfahrtsysteme - Funktionelle und technische
spécification technique de besoin (ISO 21351:2005) Spezifikationen (ISO 21351:2005)
This European Standard was approved by CEN on 28 February 2005.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 21351:2005: E
worldwide for CEN national Members.
Contents
Page
Foreword.4
Introduction .5
1 Scope .6
2 Normative references .6
3 Terms, definitions and abbreviations.6
3.1 Terms and definitions .6
3.2 Abbreviated terms .8
4 Functional specification and technical specification purpose and description .8
4.1 Functional specification purpose and description .8
4.2 Technical specification purpose and description.8
4.3 FS and TS content .8
5 Process for establishing a functional specification and a technical specification .9
5.1 General.9
5.2 Process for establishing a functional specification.11
5.3 Process for establishing a technical specification .12
6 Technical requirements description.13
6.1 General description .13
6.2 Identification of attributes assigned to technical requirements.13
6.2.1 Introduction.13
6.2.2 Functional requirements description .14
6.2.3 Mission requirements description .14
6.2.4 Interface requirements description.14
6.2.5 Environmental requirements description .14
6.2.6 Physical requirements description.14
6.2.7 Operational requirements description.15
6.2.8 Human factor requirements description .15
6.2.9 (Integrated) logistics support requirements description .15
6.2.10 Product assurance (PA) requirements description.15
6.2.11 Configuration requirements description.16
6.2.12 Design requirements description.16
7 Requirements and recommendations for functional specifications and technical
specifications.16
7.1 Requirements and recommendations common to FS and TS .16
7.1.1 General.16
7.1.2 Responsibility .16
7.1.3 Technical requirements organisation.16
7.1.4 Unique technical reference.17
7.1.5 Configuration management.17
7.1.6 Format.17
7.1.7 Supplementary information.17
7.1.8 Restrictions .17
7.1.9 Severity classification .17
7.2 Requirement specific to the functional specification .17
8 Requirements and recommendations for characterizing the technical requirements.17
8.1 Requirements and recommendations for the characteristics of a technical requirement
common to FS and TS.17
8.1.1 Performance .17
8.1.2 Justification .18
8.1.3 Configuration management and traceability .18
8.1.4 Ambiguity .18
8.1.5 Uniqueness .18
8.1.6 Identifiability .18
8.1.7 Singularity .18
8.1.8 Completeness .19
8.1.9 Prioritization.19
8.2 Requirements and recommendations for the characteristics of a technical requirement in
the FS.19
8.2.1 Flexibility .19
8.2.2 Severity.19
8.2.3 Maturity.19
8.3 Requirements and recommendations for the characteristics of a technical requirement in
the TS.19
8.3.1 Verification .19
8.3.2 Attainability .20
8.3.3 Tolerance.20
8.3.4 Risk .20
8.4 Requirements and recommendations for the wording.20
8.4.1 General format .20
8.4.2 Required verbal form .20
8.4.3 Format restrictions.20
Bibliography.22
Figures
Figure 1 Model presentations .9
Figure 2 Relationship between the FS and the TS.10
Figure 3 Process to establish the first issue of the FS .11
Figure 4 Process to establish the final issue of the FS.12
Figure 5 Process to establish the TS.13
Foreword
This document (EN ISO 21351:2005) has been prepared by European Cooperation for Space Standardization
(ECSS), the secretariat of which is held by CMC, in collaboration with Technical Committee ISO/TC 20
“Aircraft and space vehicles”.
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 November 2005, and conflicting national standards shall be withdrawn
at the latest by November 2005.
1)
It is based on a previous version originally prepared by the ECSS Functional and Technical Specification
Working Group, reviewed by the ECSS Engineering Panel and approved by the ECSS Steering Board. The
ECSS is a cooperative effort of the European Space Agency, national space agencies and European industry
associations for the purpose of developing and maintaining common standards.
This European Standard is one of the series of space standards intended to be applied together for the
management, engineering and product assurance in space projects and applications.
Requirements in this docu
...
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