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| Criterion |  Product Discovery Opportunity Interview |  Operations Failure Mode and Effects Analysis |  Operations Fault Tree Analysis |  Operations Fishbone Diagram |
|---|---|---|---|---|
Purposedifferent | When opportunities are still hidden behind signals of need, it structures conversations around needs and obstacles. It looks for patterns that lead to new product opportunities. | 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. | For a critical top event with several possible triggers, the method logically models failure paths. It makes visible which combinations of conditions can lead to damage. | 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. |
Complexitydifferent | Medium | High | High | Low |
Timedifferent | 30-60 min je Interview | 2-6 h | 2-6 h | 30-60 min |
Participantsdifferent | 5-12 Interviews | 3-10 | 3-8 | 2-8 |
Formatdifferent | Workshop + async | Workshop | Workshop + async | Workshop |
Outputdifferent | Interview Notes, Opportunity Themes, Customer Quotes | FMEA Table, Risk Priority, Mitigation Actions | Fault Tree, Critical Paths, Cause Hypotheses, Control Actions | Fishbone Diagram, Cause Categories, Investigation Backlog |
Tagsno overlap | DiscoveryInterviewsOpportunityCustomer | RiskQualityOperationsRoot cause | RiskRoot causeSafety | Root causeQualityOperations |