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| Criterion |  Innovation How Might We |  Operations Barrier Analysis |  Operations Causal Factor Analysis |  Operations Family Tree Analysis |
|---|---|---|---|---|
Purposedifferent | With a stuck problem carrying many implicit assumptions, the method translates observations into open, workable questions. It sharpens the problem frame without pre-thinking the solution, turning frustration or fuzziness into a search space with clear direction. | For a risk that can only be managed through multiple layers of protection, the method examines the effectiveness of each barrier. It shows where safeguards are missing, too weak, or fail under real conditions. | For an event with a complicated course, the method breaks down the contributing factors along the timeline. It shows how conditions, decisions, and reactions together produce a course of events. | For a series of incidents with a similar pattern, the method arranges individual events as branches of a common origin. It makes visible which conditions keep recurring. |
Complexitydifferent | Low | Medium | High | Medium |
Timedifferent | 30–45 min | 2-4 h | 2-6 h | 2-4 h |
Participantsdifferent | 1-10 | 2-6 | 3-10 | 2-6 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | HMW Questions, Challenge Framing, Idea Prompts | Barrier Inventory, Failure Analysis per Barrier, Action Backlog | Event Timeline, Causal Factor Chart, Cause List, Corrective Actions | Family Tree Diagram, Pattern Notes, Systemic Measures |
Tagsno overlap | FramingOpportunityIdeationQuestions | Root causeSafetyIncident | CausalityIncidentRoot causeTimeline | Root causePatternsIncidentSystemic |