ISO 21350:2023

Space systems — Off-the-shelf item utilization

This document 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. This document doesn't cover 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

• Status: Published
• Publication Date: 16-Apr-2023
• ICS: 49.140 - Space systems and operations
• Technical Committee: ISO/TC 20/SC 14 - Space systems and operations
• Drafting Committee: ISO/TC 20/SC 14 - Space systems and operations
• Current Stage: 6060 - International Standard published
• Start Date: 17-Apr-2023
• Due Date: 25-Feb-2024
• Completion Date: 17-Apr-2023

Relations

• Revises: ISO 21350:2007 - Space systems — Off-the-shelf item utilization
• Effective Date: 06-Jun-2022

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 21350
Second edition
2023-04
Space systems — Off-the-shelf item
utilization
Systèmes spatiaux — Utilisation d'équipement prêt à l'emploi
Reference number
ISO 21350:2023(E)
© ISO 2023

---------------------- Page: 1 ----------------------
ISO 21350:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
  © ISO 2023 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 21350:2023(E)
Contents Page
Foreword .v
Introduction . vi
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
5.1.1 General . 2
5.1.2 OTS item requirements . 2
5.1.3 OTS item evaluation . 2
5.2 Rules in a critical application of OTS . 3
5.2.1 Operational boundaries . 3
5.2.2 Design evaluation . 3
5.2.3 OTS item modifications . 3
5.2.4 Qualification requirements . 3
6 Precautions and warning notes . 4
6.1 Notes about product heritage of OTS item . 4
6.1.1 OTS product heritage . 4
6.1.2 Application of OTS item design/manufacturing practices . 4
6.1.3 OTS item design margins . 4
6.2 Acquisition of OTS items . 4
6.2.1 General . 4
6.2.2 Specification . 4
6.2.3 Space environment . 4
6.2.4 Configuration control. 4
6.2.5 Acceptance testing . 4
6.2.6 Maintenance . 5
6.3 Management of modified OTS item . 5
6.3.1 Purchasing . 5
6.3.2 Qualification . 5
6.4 Programmatic decision to use an OTS item. 5
6.4.1 Functional/technical capability . 5
6.4.2 Interface definition . 5
6.4.3 Modification versus heritage. 5
7 Decision logic for OTS item usage .5
8 Procedure .6
8.1 Categorizing of available OTS items . 6
8.2 Considering a good candidate for selection . 6
8.3 Compromise of discrepancies between an OTS item and project requirements . 6
8.4 Satisfying the OTS item’s requirements. 6
8.4.1 Qualification plan . 6
8.4.2 Categorization . 6
8.4.3 Combining the parameters . . 7
Annex A (informative) A decision logic for OTS item utilization . 8
Annex B (normative) Requirement list for OTS item utilization .12
Annex C (informative) OTS item application categories .14
iii
© ISO 2023 – All rights reserved

---------------------- Page: 3 ----------------------
ISO 21350:2023(E)
Bibliography .15
iv
  © ISO 2023 – All rights reserved

---------------------- Page: 4 ----------------------
ISO 21350:2023(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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use
of (a) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed
patent rights in respect thereof. As of the date of publication of this document, ISO had not received
notice of (a) patent(s) which may be required to implement this document. However, implementers are
cautioned that this may not represent the latest information, which may be obtained from the patent
database available at www.iso.org/patents. ISO shall not be held responsible for identifying any or all
such patent rights.
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 20, Aircraft and space vehicles,
Subcommittee SC 14, Space systems and operations.
This second edition cancels and replaces the first edition (ISO 21350:2007), which has been technically
revised.
The main changes are as follows:
— normative references updated, and related terms and definitions added and renumbered;
— minor changes in Clauses 4, 5, 6 and annexes.
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.
v
© ISO 2023 – All rights reserved

---------------------- Page: 5 ----------------------
ISO 21350:2023(E)
Introduction
Space projects and organizations 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 and organizations have successfully used OTS items in a wide variety of space
applications, largely in part, through structured application of best practices in business, management
and engineering by understanding the risk associated with using OTS items.
vi
  © ISO 2023 – All rights reserved

---------------------- Page: 6 ----------------------
INTERNATIONAL STANDARD ISO 21350:2023(E)
Space systems — Off-the-shelf item utilization
1 Scope
This document 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.
This document doesn't cover 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 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 9000, Quality management systems — Fundamentals and vocabulary
ISO 14300-1, Space systems — Programme management — Part 1: Structuring of a programme
ISO 14300-2, Space systems — Programme management — Part 2: Product assurance
ISO 17666, Space systems — Risk management
ISO 10795, Space systems — Programme management and quality — Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 9000, ISO 10795 and the
following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/ .
3.1
critical application
application where a failure can cause loss of life or loss of mission
3.2
high heritage
item from the original supplier that has maintained the great majority of the original service, design,
performance and manufacturing characteristics
Note 1 to entry: for this item all essential product characteristics must be assessed to establish its product
heritage
3.3
low heritage
item that is not build by the original manufacturer, does not have a significant history of successful test
and usage, or has significant aspects of the original service, design performance and manufacturing
characteristics altered
1
© ISO 2023 – All rights reserved

---------------------- Page: 7 ----------------------
ISO 21350:2023(E)
3.4
off-the-shelf
OTS
existing item which has been developed for a specific application and is intended to be used in another
application
3.5
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 characteristics
4 Requirements
4.1 Responsibilities
It is the responsibility of the project or engineering organization to procure OTS items in accordance
with this document.
4.2 Tailoring
When viewed from the perspective of a specific programme or project context, the requirements
defined in this document 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
This document is intended for use complementary to the requirements of ISO 14300-1 and ISO 14300-2.
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 evaluat
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 21350
ISO/TC 20/SC 14
Space systems — Off-the-shelf item
Secretariat: ANSI
utilization
Voting begins on:
2023-01-20
Systèmes spatiaux — Utilisation d'équipement prêt à l'emploi
Voting terminates on:
2023-03-17
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 21350:2023(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. © ISO 2023

---------------------- Page: 1 ----------------------
ISO/FDIS 21350:2023(E)
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 21350
ISO/TC 20/SC 14
Space systems — Off-the-shelf item
Secretariat: ANSI
utilization
Voting begins on:
Systèmes spatiaux — Utilisation d'équipement prêt à l'emploi
Voting terminates on:
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
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.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
CP 401 • Ch. de Blandonnet 8
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
CH-1214 Vernier, Geneva
DOCUMENTATION.
Phone: [phone]
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: [e-mail]
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 21350:2023(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
  © ISO 2023 – All rights reserved
NATIONAL REGULATIONS. © ISO 2023

---------------------- Page: 2 ----------------------
ISO/FDIS 21350:2023(E)
Contents Page
Foreword .v
Introduction . vi
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
5.1.1 General . 2
5.1.2 OTS item requirements . 2
5.1.3 OTS item evaluation . 2
5.2 Rules in a critical application of OTS . 3
5.2.1 Operational boundaries . 3
5.2.2 Design evaluation . 3
5.2.3 OTS item modifications . 3
5.2.4 Qualification requirements . 3
6 Precautions and warning notes . 4
6.1 Notes about product heritage of OTS item . 4
6.1.1 OTS product heritage . 4
6.1.2 Application of OTS item design/manufacturing practices . 4
6.1.3 OTS item design margins . 4
6.2 Acquisition of OTS items . 4
6.2.1 General . 4
6.2.2 Specification . 4
6.2.3 Space environment . 4
6.2.4 Configuration control. 4
6.2.5 Acceptance testing . 4
6.2.6 Maintenance . 5
6.3 Management of modified OTS item . 5
6.3.1 Purchasing . 5
6.3.2 Qualification . 5
6.4 Programmatic decision to use an OTS item. 5
6.4.1 Functional/technical capability . 5
6.4.2 Interface definition . 5
6.4.3 Modification versus heritage. 5
7 Decision logic for OTS item usage .5
8 Procedure .6
8.1 Categorizing of available OTS items . 6
8.2 Considering a good candidate for selection . 6
8.3 Compromise of discrepancies between an OTS item and project requirements . 6
8.4 Satisfying the OTS item’s requirements. 6
8.4.1 Qualification plan . 6
8.4.2 Categorization . 6
8.4.3 Combining the parameters . . 7
Annex A (informative) A decision logic for OTS item utilization . 8
Annex B (normative) Requirement list for OTS item utilization .12
Annex C (informative) OTS item application categories .14
iii
© ISO 2023 – All rights reserved

---------------------- Page: 3 ----------------------
ISO/FDIS 21350:2023(E)
Bibliography .15
iv
  © ISO 2023 – All rights reserved

---------------------- Page: 4 ----------------------
ISO/FDIS 21350:2023(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 non­governmental, 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 20, Aircraft and space vehicles,
Subcommittee SC 14, Space systems and operations.
This second edition cancels and replaces the first edition (ISO 21350:2007), which has been technically
revised.
The main changes are as follows:
— normative references updated, and related terms and definitions added and renumbered;
— minor changes in Clauses 4, 5, 6 and annexes.
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.
v
© ISO 2023 – All rights reserved

---------------------- Page: 5 ----------------------
ISO/FDIS 21350:2023(E)
Introduction
Space projects and organizations are more often faced with proposals to use off­the­shelf (OTS) items
which can offer opportunities for reduced cycle time, faster insertion of new technology and lower
procurement costs.
Space projects and organizations have successfully used OTS items in a wide variety of space
applications, largely in part, through structured application of best practices in business, management
and engineering by understanding the risk associated with using OTS items.
vi
  © ISO 2023 – All rights reserved

---------------------- Page: 6 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 21350:2023(E)
Space systems — Off-the-shelf item utilization
1 Scope
This document 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.
This document doesn't cover 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 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 9000, Quality management systems — Fundamentals and vocabulary
ISO 14300­1, Space systems — Programme management — Part 1: Structuring of a programme
ISO 14300­2, Space systems — Programme management — Part 2: Product assurance
ISO 17666, Space systems — Risk management
ISO 10795, Space systems — Programme management and quality — Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 9000, ISO 10795 and the
following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/ .
3.1
critical application
application where a failure can cause loss of life or loss of mission
3.2
high heritage
item from the original supplier that has maintained the great majority of the original service, design,
performance and manufacturing characteristics
Note 1 to entry: for this item all essential product characteristics must be assessed to establish its product
heritage
3.3
low heritage
item that is not build by the original manufacturer, does not have a significant history of successful test
and usage, or has significant aspects of the original service, design performance and manufacturing
characteristics altered
1
© ISO 2023 – All rights reserved

---------------------- Page: 7 ----------------------
ISO/FDIS 21350:2023(E)
3.4
off-the-shelf
OTS
existing item which has been developed for a specific application and is intended to be used in another
application
3.5
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 characteristics
4 Requirements
4.1 Responsibilities
It is the responsibility of the project or engineering organization to procure OTS items in accordance
with this document.
4.2 Tailoring
When viewed from the perspective of a specific programme or project context, the requirements
defined in this document 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 requ
...

FINAL DRAFT INTERNATIONAL STANDARD
ISO/FDIS 21350:20222023(E)
ISO TC 20/SC14/WG 5
Secretariat: ANSI/AIAA
Second edition
2022-09-2001-05
Space systems — Off-the-shelf item utilization
Systèmes spatiaux — Utilisation d'équipement prêt à l'emploi

---------------------- Page: 1 ----------------------
ISO/DISFDIS 21350:20222023(E)
© ISO 20222023
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
CP 401 • CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Email: [e-mail]@iso.org
Website: www.iso.orgwww.iso.org
Published in Switzerland.
ii © ISO 20222023 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/DISFDIS 21350:20222023(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 . 3
5.1 Evaluation of the OTS item design . 3
5.2 Rules in a critical application of OTS . 3
6 Precautions and warning notes . 4
6.1 Notes about product heritage of OTS item . 4
6.2 Acquisition of OTS item . 4
6.3 Management of modified OTS item . 5
6.4 Programmatic decision to use an OTS item . 6
7 Decision logic for OTS item usage . 6
8 Procedure . 6
8.1 Categorizing of available OTS items . 6
8.2 Considering a good candidate for selection . 6
8.3 Compromise of discrepancies between an OTS item and project requirements . 6
8.4 Satisfying the OTS item's requirements . 7
Annex A (informative) A decision logic for OTS item utilization . 8
Annex B (normative) Requirement list for OTS item utilization . 12
Annex C (informative) OTS item application categories . 14
Bibliography . 15
© ISO 2022 2023 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO/DISFDIS 21350:20222023(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/directiveswww.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/patentswww.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.htmlwww.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 20, Aircraft and space vehicles,
Subcommittee SC 14, Space systems and operations.
This second edition cancels and replaces the first edition (ISO 21350:2007), which has been technically
revised.
The main changes are as follows:
— normative references updated, and related terms and definitions added and renumbered;
— minor changes in clausesClauses 4, 5, 6 and annexes.
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.htmlwww.iso.org/members.html.
iv © ISO 20222023 – All rights reserved

---------------------- Page: 4 ----------------------
ISO/DISFDIS 21350:20222023(E)
Introduction
Space projects and organizations 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 and organizations have successfully used OTS items in a wide variety of space
applications, largely in part, through structured application of best practices in business, management
and engineering by understanding of the risk associated with using OTS items.
© ISO 2022 2023 – All rights reserved v

---------------------- Page: 5 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 21350:2022(E)

Space systems — Off-the-shelf item utilization
1 Scope
This document 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.
This document doesn't cover 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 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 9000, Quality management systems — Fundamentals and vocabulary
ISO 14300-1:2001, Space systems — Programme management — Part 1: Structuring of a programme
ISO 14300-2, Space systems — Programme management — Part 2: Product assurance
ISO 17666, Space systems — Risk management
ISO 10795, Space systems — Programme management and quality — Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 9000, ISO 10795 and the
following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obphttps://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/https://www.electropedia.org/.
3.1
critical application
application where a failure can cause loss of life or loss of mission
3.2
high heritage
item from the original supplier that has maintained the great majority of the original service, design,
performance and manufacturing characteristics
Note: for 1 to entry: For this item all essential product characteristics must be assessed to establish its product
heritage
© ISO 2022 – All rights reserved 1

---------------------- Page: 6 ----------------------
ISO/FDIS 21350:2022(E)
Formatted: Font: 11 pt
3.3
low heritage
item that is not build by the original manufacturer, does not have a significant history of successful test
and usage, or has significant aspects of the original service, design performance and manufacturing
characteristics altered
3.4
off-the-shelf
OTS
existing item which has been developed for a specific application and is intended to be used in another
application
3.5
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 characteristics
4 Requirements
4.1 Responsibilities
It is the responsibility of the project or engineering organization to procure OTS items in accordance
with this document.
4.2 Tailoring
When viewed from the perspective of a specific programme or project context, the requirements
defined in this document 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
This document is intended for use complementary to the requirements of ISO 14300-1, and ISO 14300-
2. 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.
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ISO/FDIS 21350:20222023(E)
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 includes 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.
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 either or both of the following
requirements apply.
a) An appropriate conservative design margin (i.e., margin) shall be applied by the responsible design
organization for the intended use conditions.
b) A comprehensive inspection and test programme shall be implemented to prove that the OTS item
is acceptable.
Since the OTS item is being operated outside its envelope, these extra measures provide the confidence
in the design that is 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 application of a design that utilizes OTS items shall be
identified and evaluated. This evaluation shall ensure that the intended mission applicable functions to
be performed by the OTS items are addressed and that the previous existing functions of the OTS items
are consistent with the new application.
5.2.3 OTS item modifications
Following the configuration management rules applicable to the project, the OT
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