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Interface and Integration Risk Register
On multi-contractor programmes, many delays and claims start at the boundaries: one contractor waits for another's design data, access or connection. List each interface between two parties with its type, need date, status, likelihood, impact and owner. The register draws an interface matrix, rates and sorts the open interfaces, flags overdue and disputed items, shows which parties carry most exposure and gives the actions for your next interface meeting.
- Builder
- 12 min
- Free
- Sources checked November 2026
Who it is for
- Programme integration and interface managers
- PMOs and owner's engineers
- Systems integration teams (rail, metro, utilities, smart cities)
- PIUs with several works contracts on one site
What you get
- An interface matrix between all parties
- Risk ratings and the highest open interfaces
- Overdue, disputed and undefined interfaces
- Exposure by party
- Actions for the next interface meeting
- CSV export of the register
How this tool works
- Built on
- Interface management practice from systems engineering (ISO/IEC/IEEE 15288, INCOSE) and major programme guidance (ISO 21502, APM Body of Knowledge).
- Scoring
- Rating is likelihood x impact (1 to 25). The score is the share of interfaces that are agreed, or defined with an owner.
- Limitations
- A register is only as good as its last update: review it at every interface meeting.
- Your data
- What you type stays in your browser unless you save it to a free account. We receive your name, email and summary only when you open your results.
- Sources checked
- November 2026 (checked every month)
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Questions
What is an interface?
A point where the work, information or systems of two parties must fit together: physical (a connection), functional (one system relies on another), data, contractual, organisational, schedule or regulatory.
Who should own an interface?
Usually the party that needs the input, with the owner's integration team as referee. Every interface needs one named owner.
Can I import my existing register?
Use Load to open a saved file, or copy rows in; the CSV button exports the register for Excel.
Based on
- ISO 21502:2020 Project, programme and portfolio management: guidance on project management International Organization for Standardization.
- Project Routemap (UK Infrastructure and Projects Authority) Guidance for setting up major projects for success.
- APM Body of Knowledge, 7th edition Association for Project Management, 2019.
- ISO/IEC/IEEE 15288:2023 Systems and software engineering: system life cycle processes Interface definition and integration processes.
- INCOSE Systems Engineering Handbook, 5th edition Interface management practice.
Sources checked: November 2026. We check the official sources every month.
A guidance tool, not a formal assessment, audit or legal opinion. Your contracts, the financier's policies and national law always take precedence.
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