System behaviour
Architecture that survives execution
LeanSignal technical brief · Enterprise data & systems architecture.
Architecture documents describe intended structure. Runtime behaviour emerges from state, timing, orchestration, versions, policy enforcement and failure handling across the actual system.
Design-time intent needs a runtime counterpart.
If policy, lifecycle and control decisions are reimplemented independently across components, the deployed system can diverge from the intended architecture even when each component appears locally correct.
Questions worth making explicit
- Where are authoritative state, version and configuration held?
- How are state and version disagreements resolved?
- Which failures are contained and which propagate across boundaries?
- What fallback and recovery contract applies after partial failure?
- Which policy decisions are evaluated locally, centrally or at the boundary?
- Does observability follow the dependency path rather than only individual services?
Architecture principle
Define runtime contracts for state, policy, failure and recovery alongside static interfaces and data models.
General architecture guidance. Specific environments require adaptation to their security, regulatory, operational and technology constraints.