Predict impacts of architectural changes on dependent systems. Trace dependencies, assess risk, plan rollout. Use when making major changes or analyzing blast radius.
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Systematically analyze impacts of architectural changes to predict risk and plan safe rollout.
You are analyzing impact of a major change. Trace affected systems, identify risks, plan mitigation. Read current dependency graph, deployment practices, system health metrics.
Based on change management and impact analysis frameworks:
Trace Dependencies: What systems depend on the component you're changing? Use dependency graph tools (source analysis, API scanning). Interview teams.
Assess Direct Impact: For the component itself, what's changing? Behavior? Performance? Data model? How does change affect invariants, contracts, SLAs?
Assess Indirect Impact: For each dependent system, how does change affect it? Can they continue working with new interface? Will they need code changes? Testing?
Calculate Risk Score: How many systems affected? (x10 multiplier per additional system). How critical are those systems? (x5 for customer-facing, x2 for internal). Estimate blast radius.
Plan Mitigation: For high-risk changes, plan phased rollout (10% users, 50%, 100%). Parallel run (old and new simultaneously). Comprehensive testing and monitoring. Runbook for quick rollback.