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  17025, Guide 25, A2LA (Cal., Meas., and Test)
  Sample size/ No. of Trials for MSA

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Author Topic:   Sample size/ No. of Trials for MSA
Raghav
Lurker (<10 Posts)

Posts: 2
From:Bangalore, India
Registered: Jun 2001

posted 29 June 2001 05:54 AM     Click Here to See the Profile for Raghav   Click Here to Email Raghav     Edit/Delete Message   Reply w/Quote
On what basis do we set
# sample size/ subgroup size for control charts (stability study)
# number of trials for bias/linearity/R&R studies
# number of appraisers for R&R

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Al Dyer
Forum Wizard

Posts: 814
From:Lapeer, MI USA
Registered: Oct 2000

posted 29 June 2001 01:14 PM     Click Here to See the Profile for Al Dyer   Click Here to Email Al Dyer     Edit/Delete Message   Reply w/Quote
Raghav:

# sample size/ subgroup size for control charts (stability study)

*5 ongoing, we chart weekly to look for trends.
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# number of trials for bias/linearity/R&R studies

*Bias = 1 part (could use an XR chart over time.

*Linearity = 1 part measuring bias over the travel range of the gage

*R&R = 3 people measuring 10 sequentially numbered parts.
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# number of appraisers for R&R

*3
---------------------------------------------

These are very basic guidelines that can be revised based on the type and application of the gage.

ASD...

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