Is MSA needed once or once a year for Verniers, Micrometers, Gauges, etc?

P

philip1989

#1
i have a question. is it need to do msa for all intruments once in a year?? or one time for each instrument? (vernier, micrometer diff type of gauges??
plz clarify my doubts..
 
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Jim Wynne

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#2
i have a question. is it need to do msa for all intruments once in a year?? or one time for each instrument? (vernier, micrometer diff type of gauges??
plz clarify my doubts..
Welcome to the Cove. :bigwave:

MSA should have to be redone only if something significant changes. For example, if you're using a caliper to measure a given part feature and change to using something else, the something else should be qualified for that particular use. You might also want to do it again if you have questions about operators doing measurements properly. In general though, MSA is not something that needs to be done on a periodic basis.
 

qusys

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#4
i have a question. is it need to do msa for all intruments once in a year?? or one time for each instrument? (vernier, micrometer diff type of gauges??
plz clarify my doubts..
Agree with Jim.
I would only like to add that if your customer require MSA each year for the tools/equipment on your control plan ,it becomes a requirment and you shall comply with it.
it is clearly a cost for the organization that impact the price of your product you provide.
Hope this helps too:bigwave:
 
S

sitapaty

#5
Agree with Jim.
I would only like to add that if your customer require MSA each year for the tools/equipment on your control plan ,it becomes a requirment and you shall comply with it.
it is clearly a cost for the organization that impact the price of your product you provide.
Hope this helps too:bigwave:
A wellinformed customer has no basis to specify repeat of MSA when no significant change is there in the process inputs.
-Sitapaty
 

bobdoering

Stop X-bar/R Madness!!
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#7
Re: Is MSA needed once or once a year for Verniers, Micrometers, Gages, etc?

I would only like to add that if your customer require MSA each year for the tools/equipment on your control plan, it becomes a requirement and you shall comply with it.
Here is how this works. The is no time function to Gage R&R. I hate to call it MSA, because MSA is actually all functions of gage verification, such as linearity bias, stability, etc. - some of which are time functions and do have periodic requirements dealt with in calibration.

Gage R&R answers the question "Is this the right gage for the job?" Logically, you should only have to answer that question once. But, if you did not capture the operator variation adequately by not using a wide enough sample of skill levels, you may have to redo it if the skill levels of the operators drops. If you change the gage, you may have to redo it if the relation of the gage to the operator or part changes. Significant changes in the gage system (operator, part, gage, environment) would initate a need for redoing the gage R&R.

There may be two reasons why a customer may require annual gage R&R: 1) they are ignorant to the point of gage R&R and rubber stamp useless requirements to cover up their fear of their ignorance, OR 2) they know their suppliers will mess with the gage and not redo the gage R&R as the should, so to make sure they didn't "break it" when they thought they were "fixing it" they try to catch these problems by forcing periodic gage R&R. Many customer requirements are generated by suppliers messing up - so they stuff more and more requirements on the supplier to try to catch them and keep them from burning the customer again. So, the true basis for the requirement may get lost.
 

qusys

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#8
A wellinformed customer has no basis to specify repeat of MSA when no significant change is there in the process inputs.
-Sitapaty
Sometimes they can could also ask even if there was no change and setting MSA for the equipment in the control plan each year .
This could be a customer requirement and you have the chance to raise the price of your product upon agreement .:bigwave:
 
X

xxyuan

#9
Does someone can help give more examples of significant change?
I only think two things: repaired equipment/Relocation equipment.
 

qusys

Trusted Information Resource
#10
Does someone can help give more examples of significant change?
I only think two things: repaired equipment/Relocation equipment.
A suggestion could be in the case the equipment was not actually used into production for long time ( I mean 1 year as an example).:bigwave:
 
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