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| Criterion |  Architecture Architecture Decision Record |  Decision Making PERT Estimation |  Agile Ideal Days |  Architecture arc42 |
|---|---|---|---|---|
Purposedifferent | An ADR permanently records an architecture decision with context, trade-offs, and consequence. It creates continuity for later changes because the decision path stays traceable. | On complex initiatives, a plain average tends to understate just how uncertain the outcome really is. It separates options, evaluation criteria, and open risks. The result is captured as a PERT Estimate, Expected Value, and Risk Notes. | When effort needs to be thought of as real working time, it offers a simple common denominator for comparison. It sorts work by value, risk, and delivery ability. The result is captured as Ideal Day Estimates, Assumption Notes, and Capacity Caveats. | arc42 structures architecture knowledge so teams can document system, decisions, and risks consistently. The template builds a living understanding of the architecture instead of scattered notes. |
Complexitydifferent | Low | Medium | Low | Low |
Timedifferent | 15-45 min | 15-45 min | 15-60 min | 1-2 Tage |
Participantsdifferent | 1-3 | 1-8 | 2-9 | 1-4 |
Formatdifferent | Async | Workshop + async | Workshop + async | Workshop + async |
Outputdifferent | ADR File, Decision Log, Rationale | PERT Estimate, Expected Value, Risk Notes | Ideal Day Estimates, Assumption Notes, Capacity Caveats | Architecture Document, Context View, Runtime View, Deployment View |
Tagsno overlap | ArchitectureRationaleDocumentationGovernance | EstimationUncertaintyRisk | EstimationEffortAgile | ArchitectureDocumentationCommunication |