P4-REQ-21-4-008 [Dido Solutions, Inc Wiki]

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====== P4-REQ-21-4-008 ======

[[dido:99_annexes:annex-d-requirements:part-04:start| Return to Requirements]]

===== Statement =====

Each implementation node artefact SHALL report or record observable behaviour according to the Phase 0 logging and exception-handling baseline.

===== Source =====

Part 4, Section 21.4: Logical Node Mapping Requirements.

===== Rationale =====

Observable implementation behavior is necessary for troubleshooting, review, operational understanding, testability, and later evidence planning.

Applying the Phase 0 logging and exception-handling baseline ensures that implementation node artefacts expose important lifecycle, processing, warning, failure, and recovery conditions consistently.

===== Applies To =====

This requirement applies to:

  * implementation node artefacts;
  * logging behavior;
  * exception handling;
  * health and status reporting; and
  * applicable audit and provenance behavior.

===== Verification =====

Verification SHALL confirm that implementation node artefacts report or record observable behavior according to the Phase 0 baseline.

Verification activities should include review checks confirming that:

  * required lifecycle and processing outcomes are recorded;
  * warnings and failures are not silently suppressed;
  * exception handling follows the approved pattern;
  * recovery conditions are reportable where applicable; and
  * observable information supports later Part 5 use.

===== Traceability =====

This requirement connects implementation node execution behavior to the Phase 0 logging, exception-handling, observation, and later evidence-planning concerns.

Related requirement identifiers:

  * [[dido:99_annexes:annex-d-requirements:part-04:p4-req-21-4-004]]
  * [[dido:99_annexes:annex-d-requirements:part-04:p4-req-21-4-007]]

Related source section:

  * [[fxdemo:04-part:21-phase-0-implementation-requirements:21-4-logical-node-mapping-requirements:start]]

===== Status =====

Draft

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