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| Criterion |  Engineering Failure Scenario Analysis |  Decision Making Pre-Mortem |  Architecture C4 Model |  Delivery Communication Plan |
|---|---|---|---|---|
Purposedifferent | In critical processes, it is not enough to plan only for the normal case. Failure Scenario Analysis looks at the path into failure and shows which failures, chains, and control gaps cause the most damage. | In early initiatives with many uncertainties, planning quickly turns too optimistic. A pre-mortem makes the expected failure visible in advance and sharpens the view of causes, gaps, and countermeasures. | The C4 Model makes a system legible across several resolution levels, from context down to code. It suits situations where different audiences need to understand the same architecture from different altitudes. | When many people need to be informed in parallel and messages would otherwise arrive unevenly or too late, a Communication Plan orders communication reliably. Channels, audiences, and cadences interlock so important information doesn't get lost. |
Complexitydifferent | Medium | Low | Low | Low |
Timedifferent | 1-3 h | 20–45 min | 1-4 h | 45-90 min |
Participantsdifferent | 3-8 | Small cross-functional group | 1-5 | 2-6 |
Formatdifferent | Workshop | Workshop | Workshop + async | Workshop + async |
Outputdifferent | Failure Scenarios, Risk Notes, Control Gaps, Test and Response Actions | Risk list, Mitigation plan, Assumption log | Context Diagram, Container Diagram, Component Diagram | Communication Plan, Channel Matrix, Message Cadence |
Tagsno overlap | FailureResilienceRisk | RiskDecisionFailurePlanning | ArchitectureCommunicationVisualization | CommunicationStakeholdersDeliveryPlanning |