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| Criterion |  Operations Fishbone Diagram |  Product Discovery Hypothesis Prioritization Canvas |  Operations Failure Mode and Effects Analysis |  Product Discovery Test Card |
|---|---|---|---|---|
Purposedifferent | When a problem has several possible contributing factors, the method sorts causes by cause areas. It prevents an initial hunch from blocking the view of other plausible drivers. | When many hypotheses compete for attention, it brings order to their learning sequence and importance. It separates problem, assumption, solution, and evidence. The result is captured as a prioritization canvas and a hypothesis backlog. | For a process, product, or service with noticeable failure risks, the method assesses possible failure modes in advance. It directs attention to combinations of occurrence, effect, and detectability. | The Test Card turns a critical assumption into a testable claim and specifies in advance which result counts as success. |
Complexitydifferent | Low | Medium | High | Low |
Timedifferent | 30-60 min | 60-90 min | 2-6 h | 20-35 min |
Participantsdifferent | 2-8 | 3-8 | 3-10 | 1-5 |
Formatdifferent | Workshop | Workshop | Workshop | Workshop + async |
Outputdifferent | Fishbone Diagram, Cause Categories, Investigation Backlog | Prioritization Canvas, Hypothesis Backlog | FMEA Table, Risk Priority, Mitigation Actions | Test Card with a pre-set threshold |
Tagsno overlap | Root causeQualityOperations | ExperimentsPrioritizationDiscoveryHypothesis | RiskQualityOperationsRoot cause | ExperimentsValidationDiscoveryHypothesis |