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Hi
First of all thank you in advance for your support
I'm working on a program(made in visual basic language) to record data during a production batch
I recorded this data automatically in an excel fiel , but to obtain some SPC values ,like cpk, ppk,.... we need to know my d2 value.
My process ( plastic-blow molding ) ,is made with 2 cavities per mould , and we are taking 2 measurements of weight (1 per cavitie ) each 2 hours , during 20 days
I know that d2 is a constant that depends on the number of data points in subgroups and on the number of data points in the sample.
in my case ...What is my d2 value ???where can i found this value???
Thanks
First of all thank you in advance for your support
I'm working on a program(made in visual basic language) to record data during a production batch
I recorded this data automatically in an excel fiel , but to obtain some SPC values ,like cpk, ppk,.... we need to know my d2 value.
My process ( plastic-blow molding ) ,is made with 2 cavities per mould , and we are taking 2 measurements of weight (1 per cavitie ) each 2 hours , during 20 days
I know that d2 is a constant that depends on the number of data points in subgroups and on the number of data points in the sample.
in my case ...What is my d2 value ???where can i found this value???
Thanks