![]() Before using these indexes to see how skilled and acceptable the process is test the process for normality. The CP index provides a measure of possible process capacity that is how well a process can perform if the underlying process conditions do not change. CP the more the small fluctuations which means the looser our process control fatigue of people in the hot sun or because the machine sometimes spewing sputtering and spitters the more likely the strip will soon be unacceptable long short or wide which creates A statistical number of IDs per thousand or per million etc. It basically provides the best case scenario for the existing process. However C P and C PK can be very useful to know whether or not the process is able to fit into the specifications under the best conditions. ![]() ![]() Both are used to measure process functions as they both compare process distribution with specification distribution.
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