Total Variation Formula - Can someone provide a source for this formula

Bev D

Heretical Statistician
Staff member
Super Moderator
#11
MasterBB: I am still unclear. what is your "historical data"?
  • Is it mutliple measurements of one part by one operator
  • or it one measurement of multiple parts by one operator?

If it is the first then calculating the measurement error by R/d2 is not the best approach.

If it is the second, then you cannot determine measurement error from that data.

A type 1 gage study requires the first...
 
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MasterBB

Involved In Discussions
#12
MasterBB: I am still unclear. what is your "historical data"?
  • Is it mutliple measurements of one part by one operator
  • or it one measurement of multiple parts by one operator?

If it is the first then calculating the measurement error by R/d2 is not the best approach.

If it is the second, then you cannot determine measurement error from that data.

A type 1 gage study requires the first...

Thanks Bev,
1. It's #1.
Type 1 Gage Study was effective.
Next steps Gage R&R.

Note: Historical data is not the same as Type 1 Gage Study. Historical data is the actual product from normal process.

Thanks a lot for your feedback.:thanks:
 
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