非常全的tqm資料(32個(gè)文件(存儲(chǔ)版)
【正文】 when deciding whether to use 1 or 2tail tables to calculate the parts per million defects.: If the mean is not equal to the Target Value, then you will have a different number of defects per million greater than the upper specification versus less than the lower specification limit. In this case, you must use the onetail table. If the mean is equal to the Target Value, then you can use the twotail table because the same number of defects is being produced on both sides of the specification limits. Process Potential this represents the case where you assume the mean is equal to the target value. Therefore, you can simply use the Cp value in the twotail table. Note: Cp values may be related to +/ Z*sigma. Normal Probability Tables Two Tail Table Based on Standardized Normal Distribution (0,1) Z
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