National foreword

This British Standard is the UK implementation of EN 9241:2025.

The UK participation in its preparation was entrusted to Technical Committee ACE/1, International and European Aerospace Policy and Processes.

A list of organizations represented on this committee can be obtained on request to its committee manager.

Contractual and legal considerations

This publication has been prepared in good faith, however no representation, warranty, assurance or undertaking (express or implied) is or will be made, and no responsibility or liability is or will be accepted by BSI in relation to the adequacy, accuracy, completeness or reasonableness of this publication. All and any such responsibility and liability is expressly disclaimed to the full extent permitted by the law.

This publication is provided as is, and is to be used at the recipient’s own risk.

The recipient is advised to consider seeking professional guidance with respect to its use of this publication.

This publication is not intended to constitute a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2026.

This European Standard was approved by CEN on 19 October 2025.

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, Czechia, 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, Türkiye and United Kingdom.

European foreword

This document (EN 9241:2025) has been prepared by ASD-STAN.

After enquiries and votes carried out in accordance with the rules of this Association, this document has received the approval of the National Associations and the Official Services of the member countries of ASD-STAN, prior to its presentation to CEN.

This document shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2026, and conflicting national standards shall be withdrawn at the latest by June 2026.

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 organizations of the following countries are bound to implement this document: 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, Türkiye and the United Kingdom.

1 Scope

The scope of the present document is to provide the elements needed for elaborating the programme execution logic and drafting the execution plan for the realization of a product.

NOTE 1 In this document, the term “logic” alone is sometimes used for “execution logic”.

NOTE 2 In this document, the term “product” is used to designate the object of the program concerned, and the term “system” is used to designate the product for anything related to system engineering.

NOTE 3 The product is also considered a “system-of-interest” and its enabling systems are also taken into account.

The execution logic and plan enable customers/suppliers to reach an agreement on how their respective processes and activities can be organized.

The aim is to enable each actor in the programme to manage their activities with sufficient visibility of the sequencing of the other stakeholders’ activities.

This document belongs to the documents supporting EN 9200 relating to the programme management specification.

The present document describes the principles of programme execution logic and defines the corresponding management requirements. This description is supplemented:

on the one hand, in terms of execution logic principles, by:
- the challenges of a basic logic common to all actors (synchronization);
- the applicable criteria to set up this basic logic;
- the translation of this logic into the programme processes;
on the other hand, in terms of implementing the execution logic, by:
- the procedures for practical implementation of the management requirements defined in EN 9200;
- adaptations of the logic according to the various constraints and specificities of the programme, and justification of these adaptations;
- the consistency between the basic logic at system level and the logics at subsystem and constituent levels.

The breakdown of clauses as used in this document gives a gradual understanding of the approach to be adopted to construct an execution logic. For instance:

Clause 5 presents the end-purpose of a programme execution logic as well as the associated basic concepts and the constituents of this logic;
Clause 6 describes and characterizes the process for building the logic;
Clause 7 concerns change control to the execution logic;
Clause 8 concentrates on the importance of capitalization and lessons learned.

This document is applicable to aeronautical, space and defence programmes. The principles can be extended to other areas of activity.

It is applicable to realization of a single product, of several samples or of a series. It is applicable to any customer/supplier level, while ensuring consistency between successive levels.

The principles described concern all programme actors, from initial expression of need through to closure of the programme.

2 Normative references

3 Terms and definitions

4 Acronyms

5 Execution logic: end-purpose, concepts and constitutive elements

5.1 End-purpose of programme execution logic

5.2 Concepts

5.3 Constitutive elements of execution logic

6 Execution logic construction process

6.1 General

6.2 Inputs for the execution logic construction process

6.3 Description of the execution logic construction activity

6.4 Interfaces with the other disciplines

6.5 Process output: execution logic

7 Execution logic change control

7.1 General

7.2 Triggers for updating the logic

7.3 Impact analysis

7.4 Decisions and baselining

8 Capitalization and lessons learned about the logic

Bibliography

BS EN 9241:2025

Aerospace series — Programme management — Execution logic

Current

Published:

31 Jan 2026