Any One Could Tell Me When I Should Use Cpk or Ppk? Thks!

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Posted by: Michael Whaley
Posted on: Thursday, 7th June 2001, 12:00 AM.

Preston:

Ppk produces an index number (like 1.33) for the process variation. Cpk references the variation to your specification limits. If you just want to know how much variation the process exhibits, a Ppk measurement is fine. If you want to know how that variation will affect the ability of your process to meet customer requirements (CTQ's), you should use Cpk. As a practical consideration, the Ppk study requires less work. In Six Sigma, I prefer to do several Ppk studies to identify the points in the process with the highest variation. After attacking those processes, I'll do a Cpk study to confirm the process' ability to consistently meet (or exceed) the customer's requirements.

Hope this helps,

Michael

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Any One Could Tell Me When I Should Use Cpk or Ppk? Thks! by preston on Wednesday, 6th June 2001

Re: Any One Could Tell Me When I Should Use Cpk or Ppk? Thks! by sundeep singh on Wednesday, 6th June 2001

Re: Any One Could Tell Me When I Should Use Cpk or Pp by Chandrasekar on Tuesday, 16th December 2003

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Re: Any One Could Tell Me When I Should Use Cpk or Ppk? Thks! by Praneet on Wednesday, 6th June 2001

Cpk or Ppk for Chemical Processes by vpschroeder on Wednesday, 29th September 2004

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Re: Cpk or Ppk for Chemical Processes by Andy U on Thursday, 30th September 2004

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Re: What Is Cpk Stands For? (Acronim of Cpk) by Jennifer on Monday, 13th August 2007

Re: Cpk or Ppk for Chemical Processes by Mike Robinson on Thursday, 28th December 2006

Re: Any One Could Tell Me When I Should Use Cpk or Ppk? Thks! by Ken on Wednesday, 6th June 2001

Re: Any One Could Tell Me When I Should Use Cpk or Ppk? Thks! by Michael Whaley on Thursday, 7th June 2001

Re: Any One Could Tell Me When I Should Use Cpk or Ppk? Thks! by SAMIR MISTRY on Saturday, 9th June 2001

Re: Any One Could Tell Me When I Should Use Cpk or Ppk by rich barber on Monday, 23rd February 2004

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Re: Any One Could Tell Me When I Should Use Cpk or Ppk? Thks! by Eoin on Thursday, 7th June 2001

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Re: Any One Could Tell Me When I Should Use Cpk or Ppk? Thks! by ed rosa on Thursday, 7th June 2001

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