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  Measurement, Test and Calibration
  MSA Frequency

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Author Topic:   MSA Frequency
Forrest
Lurker (<10 Posts)

Posts: 1
From:Sanford, NC USA
Registered: Oct 2000

posted 25 October 2000 03:08 PM     Click Here to See the Profile for Forrest   Click Here to Email Forrest     Edit/Delete Message   Reply w/Quote
At what frequency should the MSA be repeated?
Our QS 9000 auditor (UL) has ask this question, & we do not have a stated frequency for repeating MSA.
Can anyone provide guidelines or suggestions?

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Marc Smith
Cheech Wizard

Posts: 4119
From:West Chester, OH, USA
Registered:

posted 26 November 2000 09:37 PM     Click Here to See the Profile for Marc Smith   Click Here to Email Marc Smith     Edit/Delete Message   Reply w/Quote
Typically once a year or any time a change is made which will affect the gage or whatever.

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Atul Khandekar
Forum Contributor

Posts: 21
From:Pune, India
Registered: Mar 2000

posted 27 November 2000 01:41 AM     Click Here to See the Profile for Atul Khandekar   Click Here to Email Atul Khandekar     Edit/Delete Message   Reply w/Quote
Once a year sound too gross to me.

Shouldn't you conduct R&R after every calibration?

Help ...

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Geoff Cotton
Forum Contributor

Posts: 34
From:Staffordshire, England
Registered: Jun 2000

posted 27 November 2000 03:13 AM     Click Here to See the Profile for Geoff Cotton   Click Here to Email Geoff Cotton     Edit/Delete Message   Reply w/Quote
Atul,

We have over 2,000 variable gauges on site, to do GR&R studies on all of them once a year is an impossible task.

We handle the problem by working to an 'audit schedule' where each TYPE of gauge is reviewed at least once per year. The gauge to be reviewed for the audit period is selected at random.

We also carry out two GR&R studies as part of our 6 Sigma projects. These are over and above the one carried out as per the schedule.

Geoff

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Marc Smith
Cheech Wizard

Posts: 4119
From:West Chester, OH, USA
Registered:

posted 27 November 2000 06:58 AM     Click Here to See the Profile for Marc Smith   Click Here to Email Marc Smith     Edit/Delete Message   Reply w/Quote
quote:
Originally posted by Atul Khandekar:

Shouldn't you conduct R&R after every calibration?


You really have to look at the over all use of the gage, its stability and such. For example - If you have a fairly stable gage and your cal cycle is every 6 months I'm not sure an R&R after each calibration will buy you anything. The R&R should not change after a calibration. If you wanted some useful info, you might do an R&R just after a calibration and then another one just prior to the next calibration.

Are you currently doing an R&R after every calibration?

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Atul Khandekar
Forum Contributor

Posts: 21
From:Pune, India
Registered: Mar 2000

posted 27 November 2000 01:09 PM     Click Here to See the Profile for Atul Khandekar   Click Here to Email Atul Khandekar     Edit/Delete Message   Reply w/Quote
Geoff , Marc

Yes, i would like to agree with what you are saying.

Actually, i'd much prefer to calibrate an instrument based on stability study. And since calibraton involves some adjustments to the instrument, i thought r&r is in order.

I have come across customers who insist on submitting r&r results with each consignment.
I am not sure if 'Audit Cycles' would be acceptable to them.

So, the original question remains:
- At what frequency should the MSA be repeated?

Are there any definitive guidelines? At least any thumb rules?

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