1. Defects beyond the far specification limit are not included in the percentages. 2. They may include upper and lower specification limits or any other factors. 3. Manufacturing industry has developed customized specification limits known as Process Windows. 4. The specification limit is the tolerance allowed for the process and may be statistically determined. 5. The output of the process is a printed wiring board that meets the process specification limits . 6. The traditional approach would have favoured process 2 because it produces more items within the specification limit . 7. The resulting take-off weight of, required a take-off run of, well within the Air Ministry's specification limit . 8. PWI measures how well a process fits into a user-defined process limit known as the specification limit . 9. Note that the defect percentages indicate only defects exceeding the specification limit to which the process mean is nearest. 10. Using this approach, process 1 ( see picture ) is better even though some items fall beyond specification limits .
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