For teams building safety-critical or regulated products, whether that's under ASPICE, ISO 26262, IEC 62304 or DO-178C, requirements aren't just a scoping document. They're the thread that has to run through design, testing, validation and, eventually, an auditor's inbox. Requirements traceability is what keeps that thread intact. Here's what it actually means, why it tends to break down, and what a workable approach looks like in practice.
What requirements traceability actually means
It's worth separating two things that often get conflated: requirements management and requirements traceability. Requirements management is about capturing, prioritising and maintaining requirements. Traceability is about proving what happened to them afterwards, linking each requirement to the design work, test results, risk controls and validation evidence that show it was actually delivered, not just written down.
Done properly, that means every requirement connects outward to risk assessments, design artefacts, test cases and compliance documentation, and every one of those artefacts connects back to the requirement that justified it. That two-way connection is what lets a team assess the impact of a change, prove test coverage, or answer an auditor's question without a week of archaeology through old spreadsheets.
The traceability matrix: useful, but not sufficient on its own
A Requirements Traceability Matrix (RTM) maps requirements against the development artefacts and activities meant to satisfy them, and it's still a genuinely useful way to visualise coverage gaps. The problem is that most RTMs live in a spreadsheet, and spreadsheets don't update themselves. On a regulated programme where requirements, risks and test results are all changing simultaneously, a static matrix is out of date almost as soon as it's built. A traceability matrix that isn't kept live is really just a snapshot of last month's compliance position.
Why it matters beyond the audit
Traceability tends to get filed under "compliance overhead," but its real value shows up well before an audit. If a medical device requirement changes to meet a new regulatory expectation, good traceability means you can immediately see every design document, software component, risk control and verification test it touches, rather than discovering the gaps during a failed test run. The same logic applies to an automotive safety requirement change under ISO 26262: engineering can assess the blast radius before committing to the change, not after.
That visibility pays off in fewer surprises late in development, faster impact analysis when requirements shift, stronger audit readiness, and better alignment between engineering, quality and compliance teams who are otherwise prone to working from slightly different pictures of the same programme.
The main types of traceability, briefly
Forward traceability follows requirements through to implementation and test, confirming nothing got missed on the way to release.
Backward traceability runs the other way, tying every feature or design decision back to an approved requirement, which is exactly what keeps scope creep in check.
Bidirectional traceability combines both, and it's what most regulated industries treat as the baseline, because it lets you move freely in either direction when something changes.
Horizontal and vertical traceability round it out: horizontal connects related work across teams or product variants, vertical follows a single requirement down through system, implementation, and test layers.
Where traceability tends to break down
Fragmented data across tools. Different departments running different repositories, different terminology, different workflows, means the links between artefacts get thin or disappear entirely.
Manual, spreadsheet-based tracking. This is the single most common failure mode we see. It works fine at small scale and quietly falls apart as a programme grows, becoming too time-consuming to maintain accurately and too easy to get wrong.
Scale. Traceability needs grow much faster than headcount as products get more complex. Manual processes that coped with a few hundred requirements rarely cope with a few thousand.
Where it matters most
MedTech: ISO 13485 and IEC 62304 both put heavy weight on documented evidence, risk controls and testing, all of which traceability underpins directly.
Aerospace and defence: complex hardware/software systems under standards like DO-178C demand rigorous, demonstrable verification and validation.
Automotive: as vehicles pick up more software, connectivity and autonomous functionality, ISO 26262 and ASPICE both lean on traceability to connect requirements, hazards, mitigations and test evidence in an auditable way.
Building traceability that actually holds up
Define the traceability model early. Decide up front which artefacts need to connect to which, before the programme is deep enough that retrofitting it becomes painful.
Get engineering, quality and compliance aligned. Traceability that's owned by one function and ignored by the others tends not to survive contact with a real programme.
Make the links live, not static. Relationships that update automatically as artefacts change are the difference between traceability you can trust and traceability you have to double-check.
Work from a single source of truth. Centralising requirements and related artefacts cuts duplication and makes audits and reviews considerably less painful.
Use tooling built for it. At real scale, spreadsheets and disconnected point tools stop being viable. A proper ALM platform is what makes traceability sustainable rather than a constant catch-up exercise.
How Codebeamer fits in
This is exactly the gap PTC's Codebeamer is built to close. Requirements, risks, tests and validation evidence live in a single connected environment rather than scattered across spreadsheets and disconnected tools, so links stay current as the programme evolves instead of needing to be manually reconciled before every review or audit.
For teams working under ASPICE, ISO 26262, IEC 62304 or DO-178C, that connected structure is what turns traceability from a compliance chore into something closer to a genuine engineering advantage: faster impact analysis, fewer late surprises, and audit evidence that's ready when you need it rather than assembled under pressure.
Where we can help
If your team is relying on spreadsheets to manage traceability, or you're scoping out what a move to Codebeamer would involve for your specific compliance requirements, we're happy to talk it through and, where it's useful, set up a demonstration against your own workflows.