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Regression testing consumes 60-70% of total testing effort in most enterprises — yet 40% of production defects are still regressions that slipped through. The problem isn't too few tests; it's the wrong tests running at the wrong time. This guide delivers a modern regression testing strategy built on risk-based selection, intelligent test suites, and progressive execution tiers that cut regression cycles by 70% while catching more defects than full suite runs.
