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| Criterion |  Delivery Communication Plan |  Architecture ATAM (Architecture Tradeoff Analysis Method) |  Delivery Cost of Delay |  Decision Making Pre-Mortem |
|---|---|---|---|---|
Purposedifferent | 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. | 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. | Helps clarify scope, order, and delivery flow in concrete terms. It makes work, constraints, and sequence manageable. The result is captured as a Cost of Delay table and prioritization sequence. | 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. |
Complexitydifferent | Low | High | High | Low |
Timedifferent | 45-90 min | Several meetings plus preparation and analysis; total effort depends on scope | 90-180 min | 20–45 min |
Participantsdifferent | 2-6 | Evaluation team, architects, and relevant stakeholders | 3-8 | Small cross-functional group |
Formatdifferent | Workshop + async | Workshop + async | Workshop | Workshop |
Outputdifferent | Communication Plan, Channel Matrix, Message Cadence | Prioritized quality scenarios in a utility tree, Architecture risks with reasoning and assumptions, Sensitivity and trade-off points, Findings report with open investigations | CoD Table, Prioritization Sequence | Risk list, Mitigation plan, Assumption log |
Tagsno overlap | CommunicationStakeholdersDeliveryPlanning | ArchitectureQualityRiskTradeoffsStakeholders | PrioritizationDeliveryEconomicsDecision | RiskDecisionFailurePlanning |