AIAG's IATF 16949 section 7.1.5.1.1 - Torque MSA Requirement

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CorpMetro

I know there has been many different threads discussing this topic, but I don't think there has been any resolution.

What steps can an organization take to satisfy the following requirement in AIAG as it relates to torque?

IATF 16949, section 7.1.5.1.1

Measurement System Analysis


Statistical studies shall be conducted to analyze the variation present in the results of each type of inspection, measurement, and test equipment system identified in the control plan.

Is it even possible to perform a MSA on a torque device?
 

Golfman25

Trusted Information Resource
So we had the same thing. We did it as a go/no go study because we just had to meet a specific value, not measure anything. YMMV.
 
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CorpMetro

I see. However, how is repeatability tested since this is a destructed process and you cannot torque the same joint twice?
 

Golfman25

Trusted Information Resource
I see. However, how is repeatability tested since this is a destructed process and you cannot torque the same joint twice?

I don't know. This is one of those -- does it really make sense given the circumstances? Unfortunately, IATF doesn't allow thinking in these situations.
 

AMIT BALLAL

Super Moderator
I would like to know, how it is a destructive test? Why would you do destructive test on a production part?

I would like to know the process, because the one we do is a non-destructive test.
 

Miner

Forum Moderator
Leader
Admin
A better term would be non-replicable. Destructive implies physical damage to the product. I believe what CorpMetro meant was that the joint is physically changed when measured and that measurement cannot be replicated again.

You also have the issue that a static breakaway torque does not measure the same characteristic as the applied dynamic run down torque.
 
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CorpMetro

MINER hit the nail on the head. "Non-replicable" is probably a better term. Amit, could you provide some insight on your process?
 
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CorpMetro

Miner,

I have been following your blogs on MSA (They are awesome). I wanted to follow up on your blog post titled " Non-replicable MSA studies".

Could you provide some guidance on how I could apply this to applications involving Torque?

Thanks!
 

Mikey324

Quite Involved in Discussions
For some options on studies for non-replicable measurements, go to page 153 for the MSA manual. There some options for you. Would need to see what best suits your particular case. Maybe S3, large sample from stable process? You will find something to help between pg 153 ~ 157. Hope it helps.
 
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