Quality calculator
Cost of Poor Quality Calculator
Roll internal and external quality losses into a simple total cost and per-unit impact.
What this calculator does
- Combine scrap, rework, warranty, inspection, and customer penalty costs into one quality-loss number.
- Use when quality issues need financial priority for corrective action or improvement work.
- Combine scrap, rework, warranty, inspection, and customer penalty costs into one quality-loss number.
Formula used
- COPQ = scrap + rework + warranty + inspection + penalties
- Internal failure cost = scrap + rework
- COPQ per shipped unit = COPQ รท shipped units
Inputs explained
- Scrap cost: undefined
- Rework cost: undefined
- Warranty cost: undefined
- Inspection / containment cost: undefined
- Customer penalties: undefined
- Shipped units: undefined
How to use the result
- Use when quality issues need financial priority for corrective action or improvement work.
- This is a planning calculator. Validate assumptions against your process data before using the result as a final quote, schedule, or engineering decision.
Common questions
- Which inputs usually drive the cost of poor quality result? scrap cost, rework cost, warranty cost, inspection / containment cost, customer penalties, and shipped units usually have the biggest effect. When one of those assumptions changes, rerun the calculator and compare the new $ result before updating the plan.
- What does the cost of poor quality calculator do? Combine scrap, rework, warranty, inspection, and customer penalty costs into one quality-loss number.
- What inputs do I need for the cost of poor quality calculator? You need scrap cost, rework cost, warranty cost, inspection / containment cost, customer penalties, and shipped units. Use measured values from your line, quote package, supplier data, or current production plan whenever possible.
- How should I interpret the cost of poor quality result? Treat the $ output as a planning estimate for quality work. Compare it against process history, quoted assumptions, and operating limits before making final decisions.
Last reviewed 2026-05-12.