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  Statistical Techniques and 6 Sigma
  Cpk & Right First Time

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Author Topic:   Cpk & Right First Time
lee01
Lurker (<10 Posts)

Posts: 2
From:Chadderton, England
Registered: May 2001

posted 13 May 2001 07:07 PM     Click Here to See the Profile for lee01   Click Here to Email lee01     Edit/Delete Message   Reply w/Quote
I have been given the task by the University I attend to determine the relationship between Cpk and 'Right First Time', but I have come up with a blank, If anyone could e-mail me any suggestions then I would be very thankfull.

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Al Dyer
Forum Wizard

Posts: 622
From:Lapeer, MI USA
Registered: Oct 2000

posted 13 May 2001 07:25 PM     Click Here to See the Profile for Al Dyer   Click Here to Email Al Dyer     Edit/Delete Message   Reply w/Quote
I can't see a relationship.

"CpK" is quantified based upon data and requirements.

"Do it right the first time" is a "qualified" thought process based on subjective actions.

MHO

ASD...

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MSAFAI
Forum Contributor

Posts: 24
From:Tehran - IRAN
Registered: May 2001

posted 13 May 2001 08:33 PM     Click Here to See the Profile for MSAFAI   Click Here to Email MSAFAI     Edit/Delete Message   Reply w/Quote
Lee,

Is "Right First Time" the same as "First Pass Yield" (FPY)?

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Al Dyer
Forum Wizard

Posts: 622
From:Lapeer, MI USA
Registered: Oct 2000

posted 16 May 2001 05:35 AM     Click Here to See the Profile for Al Dyer   Click Here to Email Al Dyer     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by MSAFAI:
Lee,

Is "Right First Time" the same as "First Pass Yield" (FPY)?



Right the first time is the process of preventive action to ensure that potential failures are minimized, could you expand on FPY?

It may be a language thing but I read FTY as the first outcome of the process that may be controlled by GP-12 (early production containment).

ASD...

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MSAFAI
Forum Contributor

Posts: 24
From:Tehran - IRAN
Registered: May 2001

posted 19 May 2001 08:14 AM     Click Here to See the Profile for MSAFAI   Click Here to Email MSAFAI     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Al Dyer:

Right the first time is the process of preventive action to ensure that potential failures are minimized, could you expand on FPY?

It may be a language thing but I read FTY as the first outcome of the process that may be controlled by GP-12 (early production containment).

ASD...



Dear Al,

If I'm not mistaken, FPY of a process is the ratio of the parts produced without defect "first time" to the total no of parts produced. In other words:

FPY = (parts produced without defects first time / total number of parts produced)*100

"Fisrt time" refers to products without a need for repair, rework etc.

If FPY is what our friend lee01 means, then it is not difficult to relate it to Cpk.

MSAFAI

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