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Selected:Getting Things DoneRiskiest Assumption TestARID (Active Reviews for Intermediate Designs)Assumption Mapping
| Criterion |  Operations Getting Things Done |  Product Discovery Riskiest Assumption Test |  Architecture ARID (Active Reviews for Intermediate Designs) |  Product Discovery Assumption Mapping |
|---|---|---|---|---|
Purposedifferent | With many open commitments and ideas in daily life, a reliable external storage system emerges. The method relieves the mind so priority and context don't have to compete in memory. | When an idea hinges on one critical unknown, it prioritizes testing that exact piece of uncertainty first. It separates problem, assumption, solution, and evidence. The result is captured as a prioritized list of assumptions, a test plan, and a result report. | 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 assumptions still sit unordered in the room, it weighs uncertainty against leverage. It makes visible which hypotheses should be checked first. |
Complexitysame | Medium | Medium | Medium | Medium |
Timedifferent | 1-2 h Setup, laufend | 1-2 Wochen pro Iteration | 2–4 h review as a planning range; preparation and evaluation additional | 45-60 min |
Participantsdifferent | 1 | 2-6 | Designers, developers as users, and facilitation | 2-8 |
Formatdifferent | Async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Action Lists, Project List, Review Routine | Prioritized Assumption List, Test Plan, Results Report | Prioritized development tasks, Jointly produced code or pseudocode, Observed difficulties and open design questions, Proposed design revisions | Assumption map, Test backlog, Risk ranking |
Tagsno overlap | ProductivityPlanningTasksExecution | ExperimentsValidationDiscoveryAssumptions | ArchitectureEngineeringFeedbackValidationTasks | AssumptionsRiskExperimentsValidation |