case study

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Requirements Management Process Improvement

Supporting requirements management and V&V in a complex, large scale programme

Client: Network Rail plc


The Crossrail line is based on a new set of East-West tunnels under central London, connecting the Great Western Main Line near Paddington to the Great Eastern Main Line near Stratford. The Network Rail Crossrail Programme is responsible for delivering the upgrade to the existing surface elements of the route, necessary to accommodate increased traffic levels as well as the new Crossrail rolling stock. The work includes signalling upgrades, route and junctions remodelling, overhead electrification and the provision for longer trains en route and at stations. With the Crossrail extension to Reading, the separate Reading Station Area Redevelopment (RSAR) Programme was merged with the Crossrail Programme.

What we did

We were commissioned by the Network Rail Crossrail/RSAR Programme team towards the end of their GRIP Stage 3 work to support the transition to GRIP Stage 4 and to help develop and implement streamlined and pragmatic requirements management and V&V processes for GRIP Stages 4 to 8.

We are often invited to assist our clients to upgrade their exiting information management model and processes to meet new project needs, achieving step improvements in information architecture, processes, supporting tools, and users skills, behaviours and culture. In this instance, the challenge was to adequately update the information model and processes within very short timescales.

Over the course of the commission we:

  • Analysed the existing requirements traceability to identify gaps and suggest fixes;
  • Updated the Requirements Management and V&V processes;
  • Updated a set of related documents including the Systems Engineering Management Plan (SEMP), Issues and Assumptions Management Plan and the Requirements Change Control process.

A key challenge facing the Crossrail/RSAR programme for GRIP Stage 4 to 8 was the management of compliance matrices for each of the 50+ implementation projects, ensuring that they all supply incremental compliance information and evidence in a timely manner. The V&V process sets out to achieve this through a combination of streamlined process, updated approval chain, and a specific implementation and access rights policy for the DOORS database, to allow implementation projects to edit or import information directly.


integrate's skills and similar experience in the rail domain allowed us to develop rapidly the necessary information model and processes. The commission was successful in achieving the client's objective to update and streamline their processes for GRIP Stage 4 to 8.