defect-root-cause-analysis

Defect Root Cause Analysis — Symptom-Anchored

A root cause is the mechanism that turns the TRIGGER into the OBSERVED result. Anything that does not do that is not the root cause — however relevant it looks.

TRIGGER  ──►  code path actually executed  ──►  OBSERVED
                         ▲
              the root cause lives here, and only here

⚠️ No fix, no tests in this phase.

⚠️ RELEVANCE FILTER — READ BEFORE OPENING ANY FILE

The code base and the documents are full of things that look related. They are noise unless they pass this filter.