| Using d2 value from Control charts
I have only one observation per sample
The tables give values starting at 2, I am having this doubt what is the value I should use.
I have used n=2 for calculating the things. the only reason being it is closest to 1 (my value for n)
for my situation is this correct.
I am having times for a parts processed on a machine, so I have only one timing per product processed.
I have to calculate the mean SD and allied stuff. plot control chart limits stuff. So I am stuck as to what value of n is to considered for ranges calculation etc.
Please respond as soon as possible.
Rohit
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