cva-analysis
CVA Analysis - Discover Natural Abstractions
Commonality Variability Analysis (CVA) is a systematic technique for discovering abstractions from requirements. Instead of choosing patterns first, you build a matrix showing what's COMMON (constant across use cases) vs what VARIES (differs between cases). Patterns emerge naturally from the matrix structure.
Core Insight: Rows (commonalities) map to Strategy pattern. Columns (variabilities) map to Abstract Factory pattern. The matrix reveals whether abstraction is needed at all.
From CLAUDE.md Design Philosophy: "Greatest vulnerability is wrong or missing abstraction." CVA prevents wrong abstractions by making pattern selection evidence-based, not intuition-based.
Triggers
Activate CVA when you encounter:
discover abstractions for [domain]run CVA analysis on [requirements]commonality variability analysisprevent wrong abstractionwhat patterns emerge from [use cases]
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