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  Statistical Techniques and 6 Sigma
  Capability Study - Feasible?

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Author Topic:   Capability Study - Feasible?
precabcorp
Lurker (<10 Posts)

Posts: 1
From:Rockwall, TX
Registered: Feb 2000

posted 24 February 2000 11:25 AM     Click Here to See the Profile for precabcorp   Click Here to Email precabcorp     Edit/Delete Message   Reply w/Quote
We often perform capability studies for our customers on dimensions, but now we are faced with a dilema. One of our customers is asking for a capability study on a measurement that is defined as a range on the print. The print says that any measurement between .33 & .80 is good, without defining a target. We have completed the Gage R&R and the XBAR, R charts succesfully. The problem is we don't know how to do a capability study when there is no set target value. Is this possible.

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Don Winton
Forum Contributor

Posts: 498
From:Tullahoma, TN
Registered:

posted 27 February 2000 08:17 PM     Click Here to See the Profile for Don Winton   Click Here to Email Don Winton     Edit/Delete Message   Reply w/Quote
Sorry Marc, but I have been away for awhile, for reasons you know. My on-line time has also been reduced, but I will still try to help with some topics when I can. Will be back as soon as I can. Anyway, on with the show.

As far as capability goes, I would suggest precabcorp download and read the cpk.pdf paper I have written and posted. You can find it at Marc's pdf zone or you can visit the statistical portion of dWizard's lair below.

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Batman
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Posts: 111
From:Kane, PA 16735
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posted 27 February 2000 10:08 PM     Click Here to See the Profile for Batman   Click Here to Email Batman     Edit/Delete Message   Reply w/Quote
Remember that Cpk or Ppk only cares about how close you are to one tolerance end or the other, not how close you are to the target - that's Cpm. Your tolerance is .33 and .80. What's your capability?

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