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| Criterion |  Innovation Double Diamond |  Operations 5 Whys |  Agile Specification by Example |  Operations Root Cause Analysis |
|---|---|---|---|---|
Purposedifferent | For complex problems with a fuzzy situation, the method cleanly separates search space and decision. It first creates breadth in understanding and then focus in elaboration. This brings open questions, problem definition, and solution path into a traceable movement. | 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. | When business rules need to become precise, it ties language, example, and test together. It sorts work by value, risk, and delivery ability. The result is captured as an Example Table and Acceptance Tests. | 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. |
Complexitydifferent | Medium | Low | Medium | Medium |
Timedifferent | Wochen bis Monate | 15-30 min | 60-90 min pro Feature | 1-4 h |
Participantsdifferent | 3-12 | 2-6 | 3-6 | 3-8 |
Formatdifferent | Workshop + async | Workshop | Workshop | Workshop + async |
Outputdifferent | Problem Statement, Solution Options, Prototypes, Deliverables per Phase | Root cause notes, Countermeasures | Example Table, Acceptance Tests | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan |
Tagsno overlap | ProcessDivergenceInnovation | Root causeIncidentLeanProblem solving | AgileRequirementsExamplesBehavior-Driven Development | Root causeProblem solvingQualityIncident |