Purpose
Traceability exists so that every engineering artifact can be understood in the context of the work, decisions, and knowledge that produced it. It preserves the evidence chain connecting an original observation to the engineering outcome it eventually informed: what was observed, what was decided because of it, what was specified as a result, and what was built.
Traceability is a governance capability, not merely documentation. Without it, artifacts can only be evaluated in isolation; with it, they can be evaluated against the authority and evidence that produced them.
Principles
- Traceability preserves engineering context.
- Relationships between artifacts are explicit, not implied.
- Evidence remains connected to the outcomes it informed.
- Authority remains explainable: any accepted artifact can be traced back to what justified it.
- History is preserved rather than overwritten.
- Traceability supports learning as well as governance.
Traceability Chain
Observation
↓
Discovery
↓
Architectural Decision
↓
Specification
↓
Work Order
↓
Implementation Report
↓
Architecture Review
↓
Release- Observation → Discovery — an observation is captured as a Discovery, as defined by the Discovery Lifecycle.
- Discovery → Architectural Decision — a validated Discovery informs a Decision Proposal, as defined by the Architectural Decision Lifecycle.
- Architectural Decision → Specification — an accepted Decision is formalized into a Specification, as defined by the Specification Lifecycle.
- Specification → Work Order — a Specification, together with architecture built on it, scopes a Work Order, as defined by the Work Order specification.
- Work Order → Implementation Report — executing a Work Order produces its Implementation Report.
- Implementation Report → Architecture Review — the Implementation Report is evaluated against architectural intent, as defined by the Architecture Review specification.
- Architecture Review → Release — an approved review allows the work to be integrated, as defined by Release Management.
Artifact Relationships
- Discoveries reference the observations that produced them.
- Architectural Decisions reference the Discoveries that informed them.
- Specifications reference the Architectural Decisions that authorized them.
- Work Orders reference the Specifications and architecture that scoped them.
- Implementation Reports reference the Work Orders they respond to.
- Architecture Reviews reference the Implementation Reports they evaluate.
- Releases reference the approved work they integrate.
These relationships are directional: each artifact points to the upstream artifact that justifies it, and evidence flows forward from observation to release without being severed along the way.
Traceability Rules
- Every governed artifact should identify its upstream authority.
- References should remain stable once established.
- Historical references are never rewritten.
- Supersession preserves historical links rather than removing them.
- Traceability should survive tooling changes; it describes a relationship between artifacts, not a mechanism for storing them.
Governance
- Traceability supports auditability: any accepted artifact's justification can be examined.
- Missing traceability reduces engineering confidence in an artifact's authority.
- Traceability enables organizational learning by preserving the path from observation to outcome.
- Governance evaluates traceability alongside correctness; an artifact that is correct but untraceable is still a governance gap.
Outputs
- Evidence chains.
- Artifact lineage.
- Engineering history.
- Organizational knowledge graph.
Future Evolution
Traceability mechanisms may evolve — for example, in how relationships are recorded or navigated — while preserving stable, directional engineering relationships as their foundation.