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| Criterion |  Operations Change Analysis |  Architecture ARID (Active Reviews for Intermediate Designs) |  Product Discovery Concierge MVP |  Engineering Fault Isolation |
|---|---|---|---|---|
Purposedifferent | For a deviation after a change, the method isolates the influence of the altered condition. It narrows down which differences are relevant and which are just accompanying noise. | ARID examines how well developers can work with a technical design. It focuses on a part of the system that can still be revised, between the architecture overview and the detailed specification. | When an idea can first fail or grow through genuine hands-on support, it relies on manual work instead of automation. It shows whether user value holds up even under manual execution. | In technical failures, the visible symptom often gets mixed up with the actual cause. Fault Isolation narrows the fault space and progressively reduces which part of the system is truly affected. |
Complexitysame | Medium | Medium | Medium | Medium |
Timedifferent | 45-120 min | 2–4 h review as a planning range; preparation and evaluation additional | 1-4 Wochen | 30-180 min |
Participantsdifferent | 2-6 | Designers, developers as users, and facilitation | 3-10 Kunden | 1-6 |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Change Matrix, Cause Hypotheses, Validation Questions, Action List | Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions | Concierge Learnings, Service Blueprint, MVP Risks | Fault Isolation Map, Test Log, Excluded Hypotheses, Narrowed Fault Area |
Tagsno overlap | ChangeRoot causeTroubleshootingComparison | ArchitectureEngineeringFeedbackValidationTasks | MVPValidationServiceDiscovery | TroubleshootingDiagnosisEngineering |