We calculate the following values using the data given in the
above problem with the help of EXCEL SHEET.
Data sheet is longer ,so i unable to upload data file.
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Mean = |
80.25095928 |
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Standard deviation = |
6.703880411 |
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Lower Specification Limit or LSL = |
62.6 |
(given) |
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Upper Specification Limit or USL = |
101.8 |
(given) |
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cpu=(USL-Mean)/(3*standard deviation) |
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cpl=(Mean-LSL)/(3*standard deviation) |
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process performance(ppk)=min(cpu,cpl)/(6*standard
deviation) |
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cpu = |
1.071471019 |
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cpl = |
0.877648874 |
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min(cpu,cpl) = |
0.877648874 |
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ppk = |
0.021819424 |
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RESULT: |
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long term process performance (ppk) for the given data with
lower specification 62.6 |
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and
upper specification 101.8 is equal to 0.0218194. |
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