From URS to Traceability: How to Write Requirements That Can Be Tested

A requirement is a decision tool, not a wish list

The user requirements specification should describe what the process needs from the system. It should be specific enough to assess, test, approve, and revisit. “The system must be compliant” is too broad to guide evidence. “The system shall record the identity, date, time, and meaning of each approval for a controlled record” gives the team something it can design and test.

Properties of a useful requirement

• It states one clear outcome or capability.
• It uses language that can be observed or measured.
• It identifies the process, record, role, or data involved.
• It has an owner and a reason, such as a process need or control objective.
• It is linked to risk where failure could affect quality, safety, integrity, or compliance.
• It can be traced forward to design and evidence, and backward to the decision it supports.

Trace more than test cases

A strong matrix connects requirement, risk, design or configuration, test or other assurance evidence, deviation, approval, and release decision. It should also show the current state after change. A requirement with a passing test but no owner, no acceptance decision, or no change impact assessment is not fully controlled.

Test the requirement in context

A permission requirement should be tested with relevant roles, including prohibited actions. A data-transfer requirement should be tested at the interface boundary and reconciled at the destination. An audit-trail requirement should include a meaningful change and review of the resulting record. The more a requirement depends on workflow, the less useful an isolated happy-path test becomes.

Control the matrix itself

Assign version and status, protect approved baselines, and manage changes through the same process as other validation records. Review orphaned tests, untested requirements, duplicate requirements, and requirements that no longer match the current process. Traceability is a living control, not a document produced once for a project folder.

The VLMS approach to validation lifecycle management is designed around these links. Use it to expose gaps early, then keep the approved rationale with the evidence that supports it.