Is there any relationship between Cpk & Right First Time? First Pass Yield (FPY)?

L

lee01

#1
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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A

Al Dyer

#2
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...
 
A

Al Dyer

#4
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...
 
M

MSAFAI

#5
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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