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Selected:Assumption SurfacingLean CanvasArchitecture Communication CanvasATAM (Architecture Tradeoff Analysis Method)
| Criterion |  Decision Making Assumption Surfacing |  Product Strategy Lean Canvas |  Architecture Architecture Communication Canvas |  Architecture ATAM (Architecture Tradeoff Analysis Method) |
|---|---|---|---|---|
Purposedifferent | Plans often contain assumptions that were never openly stated and remain dangerous precisely because of that. Assumption Surfacing makes these silent premises visible and prioritizes which of them carry the initiative or could sink it. | When an early product bet still has too many open points, it brings target group, problem, and assumptions into a single view. It condenses the idea so core risks become nameable. | The Architecture Communication Canvas plans architecture communication so the right people receive the right message. The method turns technical complexity into deliberate communication design. | ATAM helps teams weigh architecture decisions when quality goals compete. The team considers business goals, stakeholder expectations, and technical decisions together. The evaluation shows which risks need further investigation. |
Complexitydifferent | Low | Medium | Medium | High |
Timedifferent | 45-90 min | 45-90 min | 60-120 min | Several meetings plus preparation and analysis; total effort depends on scope |
Participantsdifferent | 2-8 | 1-6 | 2-8 | Evaluation team, architects, and relevant stakeholders |
Formatsame | Workshop + async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | Assumption List, Critical Assumptions, Learning Plan | Lean Canvas, Core Assumptions, Experiment Backlog | Communication Canvas, Stakeholder Messages, Architecture Communication Plan | Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations |
Tagsno overlap | AssumptionsRiskDecisionDiscovery | StartupLeanAssumptionsBusiness model | ArchitectureCommunicationStakeholdersCanvas | ArchitectureQualityRiskTradeoffsStakeholders |