Space systems — Off-the-shelf item utilization

ISO 21350:2007 contains requirements and guidelines for the utilization of off-the-shelf (OTS) items, their selection, acquisition, integration, qualification and implementation related to a space product or system. Specifically excluded are piece parts and materials, such as electrical, electronic and electromechanical (EEE) parts, thermocouples, rivets, fasteners, connectors, fittings, adhesives, insulation, wiring and plumbing.

Systèmes spatiaux — Utilisation d'équipement prêt à l'emploi

General Information

Publication Date
Current Stage
9599 - Withdrawal of International Standard
Completion Date
Ref Project


Buy Standard

ISO 21350:2007 - Space systems -- Off-the-shelf item utilization
English language
14 pages
sale 15% off
sale 15% off

Standards Content (Sample)

First edition

Space systems — Off-the-shelf item
Systèmes spatiaux — Utilisation d'équipement prêt à l'emploi

Reference number
ISO 21350:2007(E)
ISO 2007

---------------------- Page: 1 ----------------------
ISO 21350:2007(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but
shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In
downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat
accepts no liability in this area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation
parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In
the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.


©  ISO 2007
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means,
electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or
ISO's member body in the country of the requester.
ISO copyright office
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
Published in Switzerland

ii © ISO 2007 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 21350:2007(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 1
4 Requirements . 2
4.1 Responsibilities . 2
4.2 Tailoring. 2
5 Policy . 2
5.1 Evaluation of the OTS item design . 2
5.2 Rules in a critical application of OTS . 3
6 Precautions and warning notes . 3
6.1 Notes about product heritage of OTS item .3
6.2 Notes about acquisition of OTS . 4
6.3 Management of modified OTS. 5
6.4 Programmatic decision to use OTS. 5
7 Decision logic for OTS item usage . 5
8 Procedure . 5
8.1 Categorizing of available OTS items. 5
8.2 Considering a good candidate for selection.6
8.3 Compromise of discrepancies between OTS and project requirements. 6
8.4 Satisfying OTS item requirements . 6
Annex A (informative) A decision logic for OTS item utilization. 7
Annex B (normative) Requirement list for OTS item utilization . 11
Annex C (informative) OTS item application categories . 13
Bibliography . 14

© ISO 2007 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO 21350:2007(E)
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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. 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.
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.
ISO 21350 was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles, Subcommittee
SC 14, Space systems and operations.
iv © ISO 2007 – All rights reserved

---------------------- Page: 4 ----------------------
ISO 21350:2007(E)
Space projects are more often faced with proposals to use off-the-shelf (OTS) items which can offer
opportunities for reduced cycle time, faster insertion of new technology and lower procurement costs.
Space projects have been successful in using OTS items in space systems and products. These projects
have found that the use of OTS items required a re-emphasis of some traditional business, management and
engineering practices, as well as a number of changes to other practices. Successful projects embraced these
changes by building systems that were conceived, acquired and sustained with an understanding of the risk
associated with OTS items.

© ISO 2007 – All rights reserved v

---------------------- Page: 5 ----------------------

Space systems — Off-the-shelf item utilization
1 Scope
This International Standard contains requirements and guidelines for the utilization of off-the-shelf (OTS) items,
their selection, acquisition, integration, qualification and implementation related to a space product or system.
Specifically excluded are piece parts and materials, such as electrical, electronic and electromechanical (EEE)
parts, thermocouples, rivets, fasteners, connectors, fittings, adhesives, insulation, wiring and plumbing.
2 Normative references
The following referenced documents are indispensable for the application 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 9000, Quality management systems — Fundamentals and vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 9000 and the following apply.
critical application
any application where a failure could cause loss of life or loss of mission
product heritage
collection of data supporting adequacy for the intended use by time in service, number of units in service,
mean time between failures (MTBF) performance, failure history, number of use cycles and manufacturing
characteristic of high product heritage
item from the original supplier that has maintained the great majority of the original service, design,
performance and manufacturing characteristics
characteristic of low product heritage
item that was not build by the original manufacturer, does not have a significant history of successful test and
usage, or has had significant aspects of the original service, design performance and manufacturing
characteristics altered
piece of hardware or software or combination of hardware and/or software, usually self-contained, which
performs a distinctive function
© ISO 2007 – All rights reserved 1

---------------------- Page: 6 ----------------------
ISO 21350:2007(E)
existing item which has been developed for a specific application and is intended to be used in another
expanded specifications
specification of OTS item in which the environment requirements are different from the vendor specification
and the design of the OTS item has not been changed
4 Requirements
4.1 Responsibilities
It is the responsibility of the project or engineering organization to provide OTS items in accordance with this
International Standard.
4.2 Tailoring
When viewed from the perspective of a specific programme or project context, the requirements defined in this
International Standard should be tailored to match the genuine requirements of a particular profile and
circumstances of a programme or project.
NOTE Tailoring is a process by which individual requirements or specifications, standards and related documents are
evaluated and made applicable to a specific programme or project by selection and, in some exceptional cases,
modification and addition of requirements in the standards.
5 Policy
5.1 Evaluation of the OTS item design
5.1.1 General
For projects which have design responsibility, the following practices shall be adhered to in the application of
OTS items. These practices shall address the potential impact of an OTS item at any level of functionality.
5.1.2 OTS item requirements
Requirements shall be defined and baselined for each OTS item application.
5.1.3 OTS item evaluation
Early environmental and performance tests on sample OTS items that verify supplier compliance with
procurement specifications shall be performed. The extent of this testing will be determined by design based
on the criticality of the application and the significance of any modifications performed and approved by the
project. For critical applications, product data, inspection data, and test or usage data shall be reviewed prior
to final selection of the OTS item.
During the design phase, the OTS item shall be specifically evaluated to see if the proposed application is
within the range of environments and operating conditions which are consistent with the OTS use experience
and advertised specifications. This will include evaluation of advertised specification data, vendor inspection
and test data, if available, or the generation of additional data over the intended operating and environmental
range by the project or organization intending to use the flight time testing. For an OTS item to be selected,
there shall be data showing the OTS item’s conformance to its specification, including the availability of
associated documentation.
2 © ISO 2007 – All rights reserved

---------------------- Page: 7 ----------------------
ISO 21350:2007(E)
If the intended operation of an OTS item is outside the specified operating conditions or environments over
which the item has demonstrated successful performance, then
a) an appropriate conservative design margin (i.e. margin) shall be applied by the responsible design
organization for the intended use conditions, and/or
b) a comprehensive inspection and test programme shall be implemented to prove that the OTS item is
Since the OTS item is being operated outside its envelope, these extra measures will provide the confidence
in the design that was not available through the empirical body of data that is implicit in repeated successful
operations of a common design under specified environments and operating conditions.
Qualification assessment should be conducted in accordance with ISO 15865.
5.2 Rules in a critical application of OTS
5.2.1 Operational boundaries
The OTS item shall not operate near the boundaries of its performance or environmental envelopes. To
ensure this, specific margins shall be established during the design phase of the project and adhered to during
the selection of the OTS.
5.2.2 Design evaluation
Prior to preliminary design review, critical aspects of a design that utilizes OTS items shall be identified and
evaluated. This evaluation shall ensure that the intended applicable functions to be perf

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.