Pass and Fail Counter
Record inspection outcomes.
Tap, click or press Space to keep count.
Tap anywhere inside or press Space
How the Pass and Fail Counter Works
The Pass and Fail Counter records each inspection outcome with a Pass button or a Fail button and reports the first-pass yield.
- Inspect a unit: Check the unit against the standard.
- Tap the outcome: Tap Pass or Fail. An optional Rework button records units sent back.
- Watch the yield: The tool updates pass rate after every unit.
- Save the batch: Store the batch number, inspector and results.
Pass and Fail Counter Formula
The Pass and Fail Counter first-pass yield (FPY) equals units passed on the first inspection divided by total units inspected, multiplied by 100.
- Passed
- Units passing the first time
- Failed
- Units failing inspection
Example: A batch has 470 passes and 30 fails. FPY = 470 ÷ 500 × 100 = 94%. Fail rate = 6%.
Pass and Fail Counter Reference Table
The Pass and Fail Counter conversion table converts fail counts into yields for a 200-unit batch.
| Passed | Failed | First-pass yield | Fail rate | Parts per million (PPM) failed |
|---|---|---|---|---|
| 200 | 0 | 100% | 0% | 0 |
| 198 | 2 | 99% | 1% | 10,000 |
| 194 | 6 | 97% | 3% | 30,000 |
| 190 | 10 | 95% | 5% | 50,000 |
| 180 | 20 | 90% | 10% | 100,000 |
| 160 | 40 | 80% | 20% | 200,000 |
About the Pass and Fail Counter
A Pass and Fail Counter is a 2-button inspection tally that records whether each unit meets the standard. The result is a yield figure for the batch.
First-pass yield counts only units that pass the first time, without rework. The metric shows how well a process performs before any fixes.
Ways to Use the Pass and Fail Counter
There are 5 main uses of the Pass and Fail Counter, including batch inspection and exam marking.
- Batch inspection: Inspectors record pass and fail results for each batch.
- Exam marking: Teachers tally pass and fail results in a class.
- Software testing: Testers count passing and failing manual test cases.
- Seed germination: Growers count seeds that sprout and seeds that fail.
- Equipment checks: Safety staff count devices passing an inspection.
Tool Details
- Category
- Inventory & Production
- Controls
- Taps and keys
- Input Support
- Touch, Pen, Mouse, Keys
- Offline Ready
- On your device