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Dear Mr steve
Thank you for your info to understand better.
I do have a another Question with me.?WE are using the same formula for the Machine capability and the process capability.Is there is any other unity in this other than we are trying to capture the stablity of the machine /process or the varianblity of the machine/process.
Expecting your reply
REGARDS
R.LS.ATTHISH KUMAR
sathish_801980 at yahoo dot com
Dear Mr steve
Thank you for your info to understand better.
I do have a another Question with me.?WE are using the same formula for the Machine capability and the process capability.Is there is any other unity in this other than we are trying to capture the stablity of the machine /process or the varianblity of the machine/process.
Expecting your reply
REGARDS
R.LS.ATTHISH KUMAR
sathish_801980 at yahoo dot com
Steve Prevette said:
The 25 sets of 5 (or 4) is a "correct" answer, but not for the reasons given. It is not related to a histogram, but to a control chart. Dr. Shewhart originally gave the suggestion that do not declare a process stable until you have 25 stable points from subsamples of 4 on a control chart. And process capability is meaningless unless the process is indeed stable.
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NOTE 4 pg. 6 (100 minimum readings)