The 1-10-100 Rule of Quality Costs
Spending $1 in Prevention prevents $10 in factory rework (Internal Failure) and $100 in customer warranty or field recalls (External Failure).
Intermediate Category: Problem Solving & Improvement • ~7 min read
Cost of Poor Quality (COPQ) Calculator
Quantify financial losses caused by defects and build a rigorous business case for Six Sigma projects.
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Q:
What is the Cost of Poor Quality (COPQ) and the PAF Model?
The PAF model categorizes quality costs into four distinct buckets: Prevention Costs (Design, Training) + Appraisal Costs (Inspection, Testing) + Internal Failure (Scrap, Rework) + External Failure (Recalls, Warranties). In traditional companies, COPQ represents 15% to 25% of annual revenue; Six Sigma companies reduce this to under 5%.
Total COPQ$215,000PAF Model Total
% of Annual Revenue8.6%Benchmark: <5% World Class
Cost of Conformance$60,000Prevention + Appraisal
Cost of Non-Conformance$155,000Scrap, Rework, Warranty
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These tools and calculators are intended for engineering analysis, educational study, and operational guidance. They do not constitute formal regulatory certification (such as medical, aerospace flight-critical, or statutory safety filings) without independent audit and sign-off by a certified Quality Engineer or Six Sigma Black Belt. AshToolbox is not affiliated with, sponsored by, or endorsed by AIAG, ISO, ASQ, or any standards body.
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