Traceability

Make every release decision reconstructable.

Release evidence should answer what was requested, which immutable release and configuration were checked, why execution was allowed or denied, and whether a hardware signal was sent.

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01

Evidence record

  • Release identity and immutable content hash.
  • Permit, device, controller, and action bindings.
  • Decision, timestamp, and hardware-signal state.
  • A tamper-evident link to the prior organization event.
02

Evidence is not a safety claim

An evidence chain supports investigation and release accountability. It does not prove that a policy behaved safely, that a protective function worked, or that a system meets a standard.

03

Review questions

  • Can an operator distinguish a denied attempt from a dispatched action?
  • Does evidence identify the same bytes that approval covered?
  • Are retention and access controls appropriate for operational data?
  • Can revocation be correlated with later denied attempts?

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