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| Criterion |  Innovation Double Diamond |  Operations 8D Problem Solving |  Innovation Contradiction Analysis |  Operations 5 Whys |
|---|---|---|---|---|
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 an acute quality or delivery problem, the method structures immediate protection and root cause work together. It keeps the situation stable while the actual cause is investigated cleanly. | When a system should improve while another measure suffers as a result, the method makes the underlying conflict precisely formulable. It separates the desired effect from its side effect. This makes solutions possible that address the contradiction deliberately instead of half-heartedly. | 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 | Medium | High | Medium | Low |
Timedifferent | Wochen bis Monate | 1-6 Wochen | 60-120 min | 15-30 min |
Participantsdifferent | 3-12 | 4-10 | 2-8 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop |
Outputdifferent | Problem Statement, Solution Options, Prototypes, Deliverables per Phase | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Contradiction Statement, Abstraction Notes, Solution Principles, Concept Ideas | Root cause notes, Countermeasures |
Tagsno overlap | ProcessDivergenceInnovation | QualityProblem solvingRoot cause | ContradictionsInnovationProblem solving | Root causeIncidentLeanProblem solving |