A.6.3.NAR:5.2 - Architecture trade-off narrative

An architecture team needs to explain why one candidate structure was selected. It first writes a tension-ordered account: current pain, candidate split, data-custody and placement constraints, characteristic trade-off, rejected alternatives, selected structure, and remaining residual. For team orientation, the note identifies the architecture description or decision material, what alternatives are omitted, and that implementation authority remains outside the narrative.

If this account will guide a design decision or travel as architecture rationale, exact source episteme ArchitectureTradeoff-X and exact receiving narrative episteme ArchitectureRationale-Y concern the same project system. ArchitectureRationaleNarrativization : X -> Y records the exact construction and source return. Candidate structures remain independently identified A.22 objects designated by source claims, not source endpoints. The posture is prospective during choice and retrospective during reconstruction; publication, decision, synthesis, and performed Work remain separate.