Requirements engineering
Capture, decomposition and allocation of requirements from operational need down to subsystem level, with traceability maintained in both directions.
SYSTEMS ENGINEERING & INTEGRATION
Rail systems engineering and integration
Requirements, interfaces and verification managed as one traceable thread, so complex rail systems integrate cleanly and the evidence for acceptance is there when you need it.
WHAT WE DELIVER
Systems engineering that holds up at acceptance
Most late surprises on rail programmes trace back to a missed requirement or an unmanaged interface. We put the structure in place early and keep it current through delivery.
Architecture and interface management
System architecture definition, interface registers and interface control documents, and coordination across disciplines and contractors.
Verification and validation management
V&V plans, test and inspection strategies, verification cross-reference matrices, and evidence collection against every requirement.
Design assurance
Structured design reviews, configuration management, and change impact assessment so design changes don't quietly break earlier decisions.
Integration and commissioning assurance
Staged integration planning, testing and commissioning oversight, and readiness evidence for entry into service.
Systems engineering management
Systems engineering management plans and lifecycle tailoring, aligned with the EN 50126 lifecycle and ISO/IEC/IEEE 15288.
STANDARDS
Frameworks we work to
- ISO/IEC/IEEE 15288System lifecycle processes, the backbone for tailoring systems engineering activities to a project.
- ISO/IEC/IEEE 29148Requirements engineering processes and the characteristics of good requirements.
- EN 50126-1The railway lifecycle, which ties systems engineering to RAMS activities phase by phase.
- INCOSE Systems Engineering HandbookRecognised practice for systems engineering management and technical processes.
DELIVERABLES
Typical deliverables
- Systems engineering management plan
- Requirements specifications and traceability matrix
- System architecture description
- Interface register and interface control documents
- Verification and validation plan
- Verification cross-reference matrix and evidence pack
- Integration, testing and commissioning plans
HOW WE WORK
One traceable thread, start to finish
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Define the need
Turn operational and stakeholder needs into clear, testable system requirements.
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Allocate and interface
Allocate requirements to subsystems and pin down every interface between them.
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Verify as you go
Plan verification early and collect evidence progressively, not in a rush at the end.
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Integrate and accept
Integrate in stages, close open items, and hand over a complete acceptance evidence pack.
FAQ
Common questions
Why does systems engineering matter for safety approval?
Safety arguments rely on requirements being correctly specified, allocated and verified. Without traceability from hazards through requirements to verification evidence, a safety case is hard to defend.
How do you handle requirements traceability?
We trace from stakeholder needs through system and subsystem requirements to design, verification activities and evidence, and keep the links current as the design changes.
Can you work with our existing requirements tools?
Yes. We work in the tools your project already uses, whether that is a dedicated requirements management tool or structured spreadsheets.
Do you only support new projects?
No. We also help programmes already in delivery recover traceability, untangle interface issues, or prepare for an upcoming acceptance milestone.
KEEP EXPLORING
Other services
Bringing a complex rail system together?
Tell us where you are in the lifecycle and what you need to assure. We'll come back with a focused view of how we can help.