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| Criterion |  Architecture Architecture Decision Record |  Operations Eat the Frog |  Operations Root Cause Analysis |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | An ADR permanently records an architecture decision with context, trade-offs, and consequence. It creates continuity for later changes because the decision path stays traceable. | The method protects energy and attention for the task that creates the largest progress and is often postponed. | When a problem keeps recurring and the cause stays unclear, the method exposes the underlying mechanism. It separates symptom, guess, and robust explanation from one another. | For a single, hard-to-explain deviation, the method exposes the causal chain behind the visible symptom. It keeps the cause open until a controllable condition emerges instead of a mere description. |
Complexitydifferent | Low | Low | Medium | Low |
Timedifferent | 15-45 min | 15-90 min daily | 1-4 h | 15-30 min |
Participantsdifferent | 1-3 | 1 | 3-8 | 2-6 |
Formatdifferent | Async | Async | Workshop + async | Workshop |
Outputdifferent | ADR File, Decision Log, Rationale | Priority Task, Completion Note, Daily Focus | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan | Root cause notes, Countermeasures |
Tagsno overlap | ArchitectureRationaleDocumentationGovernance | PrioritizationProductivityFocusExecution | Root causeProblem solvingQualityIncident | Root causeIncidentLeanProblem solving |