About Defence

Acquisition Operating Framework (AOF)

The AOF is the authoritative source of policy and guidance on acquisition for the UK MOD and our Industry partners.

The AOF defines how we conduct, govern and control our Defence acquisition process and is a key enabler for improving our delivery to the Armed Forces and for producing greater value for money for the taxpayer.

How to access the AOF?

The AOF is now available via registered access. Please complete the registration form to get a logon account for AOF and once you have activated your account you will be able to logon and browse the AOF – see 'Register for access to the AOF' under 'External links' on the right. You will be sent an email in order to activate your account.

If you experience any difficulties in registering or accessing the AOF then please use the email address under "AOF access enquiries" on the right hand side.

What is in the AOF?

  • The Strategic Guide to Aquisition - defines acquisition, how it works and provides the high level context for how it contributes to the Defence Vision
  • Acquisition Organisations - information on our organisational structures, roles and responsibilities
  • Acquisition People - information on how we manage and develop our acquisition people
  • Acquisition Business - the information, guidance and instruction that sets out how we conduct acquisition business. It includes:

  • Through Life CapabilityManagement (TLCM), Requirements and Acceptance and Urgent Operational Requirements where you'll find information on Capability Planning, Capability Delivery, Capability Generation, User Requirements Documents (URD), System Requirements Documents (SRD), Integrated Test, Evaluation and Acceptance and more
  • System of Systems Approach where you’ll find information on the SOSA principles, SOSA Operating Model and SOSA Rulebook
  • Portfolio, Programme and Project Management (P3M) where you'll find the Project Management Standard and information on Project Start-Up Project Foundation, Through Life Management (TLM), Through Life Finance, Earned Value Management, Planning and Scheduling, Assumptions Management, Risk Management, Configuration Management, Performance Management and more
  • The Commercial Toolkit where you’ll find guidance on aspects such as contracting methods, contract administration, pricing and tendering as well as an archive of DEFCONs and DEFFORMs
  • Logistics where you'll find the governing policies of the Support Solutions Envelope (SSE), as well as guidance on Integrated Logistic Support (ILS), Reliability and Maintainability and Inventory Management
  • Safety and Environmental Protection including information on related safety and environmental protection legislation, policies, standards and management and more
  • Sustainable Procurement where you'll find information on embedding sustainable procurement in the acquisition lifecycle, sustainable defence estate procurement and more
  • Engineering including systems engineering, lifecycles, design reviews, standardisation and Managing Quality. You'll also find sector-specific and cross-cutting information including Maritime, Land, Air, Information Systems, Communications and Human Factors Integration (HFI)
  • Defence Science and Technology, Modelling and Simulation and Technology Management where you’ll find guidance on science and technology, Technology Readiness Levels (TRL), System Readiness Levels (SRL) and more
  • Planning Process
  • Approvals and Scrutiny which includes SMART approvals guidance

Why has access to AOF changed?

This change has arisen as part of the Government's ongoing efficiency drive which includes a web rationalisation programme initiated by the Cabinet Office and being led by the MOD's Central Office of Information.

AOF access enquiries

If you experience any difficulties in registering or accessing the AOF then please email the AOF team via:


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