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July 2001

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Subject:
From:
Lou Hart <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Tue, 3 Jul 2001 09:35:50 -0400
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Ken, before calculating Cpk you need to show the process is in control with
SPC charts.  From the data you use to make the charts you can calculate
Cpk.  Let me know if you need more information.  Lou Hart

-----Original Message-----
From:   Ken Fong [SMTP:[log in to unmask]]
Sent:   Monday, July 02, 2001 10:36 PM
To:     [log in to unmask]
Subject:        [TN] Sample size in computing cpk

Dear Technetters,
Could anyone give some idea what the minimum sample size is when
calculating the
cpk of a process. And based on what theory to arrive at this minimum sample
size?

Thanks,
Ken

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