Quality & Metrology worked example
Supplier Defect Rate at 1.15% target defect rate: a worked example
Push target defect rate up to 1.15% and the picture changes. This example computes every intermediate figure at that operating point. Use it for supplier scorecards, tier reviews, and corrective action decisions on incoming quality.
The inputs for this scenario
- Rejected parts from the received lot: 12 parts (unchanged)
- Total parts received from supplier: 2,000 parts (unchanged)
- Target (agreed) defect rate: 1.15 % (raised for this scenario; the documented default is 1)
Working through the calculation
- Applying the documented formula (Supplier defect rate = rejected parts ÷ parts received × 100) to the inputs above produces each figure below.
- At this operating point the engine returns 0.6 % defective for supplier defect rate, the number this scenario is built around.
- At this operating point the engine returns 0.55 points for gap to target defect rate.
- At this operating point the engine returns 12 count for rejected parts.
- At this operating point the engine returns 2,000 count for parts received.
How this compares with the baseline
- Against the tool's baseline example, where target defect rate sits at 1% and the headline result is 0.6 % defective, this scenario lands almost exactly on the baseline at 0.6 % defective.
- It computes the percentage of received parts that were rejected and the gap in percentage points between that rate and your agreed target. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.
Results at a glance
- Supplier defect rate: 0.6 % defective (headline result)
- Gap to target defect rate: 0.55 points
- Rejected parts: 12 count
- Parts received: 2,000 count
Run it with your numbers
- Every input above is editable in the live Supplier Defect Rate calculator, which recalculates instantly and can be shared with the inputs intact.
Last reviewed 2026-05-12.