View methods side by side.
Choose up to four methods. Add them using the search and share the comparison by copying its link.
| Criterion |  Operations Root Cause Analysis |  Operations 8D Problem Solving |  Innovation TRIZ |  Operations 5 Whys |
|---|---|---|---|---|
Purposedifferent | 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 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. | For technical contradictions or trade-offs, the method looks for solutions that resolve opposing requirements at the same time. It translates limits into an explicit picture of conflict that becomes workable. This produces not just compromises but more elegant principles. | 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 | High | Low |
Timedifferent | 1-4 h | 1-6 Wochen | 1-4 h | 15-30 min |
Participantsdifferent | 3-8 | 4-10 | 2-8 | 2-6 |
Formatdifferent | Workshop + async | Workshop + async | Workshop + async | Workshop |
Outputdifferent | Problem Statement, Cause Hypotheses, Confirmed Causes, Action Plan | 8D Report, Containment Plan, Root Cause Evidence, Corrective Action Plan | Contradiction Statement, Inventive Principles, Solution Concepts | Root cause notes, Countermeasures |
Tags1 shared | Root causeProblem solvingQualityIncident | QualityProblem solvingRoot cause | InnovationProblem solvingContradictionsCreativity | Root causeIncidentLeanProblem solving |