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