PFMEA no effect ratings

N

nitros1

#11
Missing parts in the box makes it close to impossible for a consumer to assemble, and in the case of a manufacturer can shut down a line.

These are not "minor" issues. There is a definite effect on the final customer when parts are missing.

:2cents:
well, I think for example, if a customer this being the person that goes to the dealer and buys a new truck, he will never notice a part was missing in the box at the assembly plant, so thats why I say there is no effect on the end user, the assembly plant will shut down a line for a missing part on a box,they use the remaining parts or they might reject the box or pallet or batch but that is it.
 
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Golfman25

Trusted Information Resource
#12
well, I think for example, if a customer this being the person that goes to the dealer and buys a new truck, he will never notice a part was missing in the box at the assembly plant, so thats why I say there is no effect on the end user, the assembly plant will shut down a line for a missing part on a box,they use the remaining parts or they might reject the box or pallet or batch but that is it.
Sounds like you need to define who your "customer" is. If you're sending kits to the assembly line, your FMEA customer is the assembly line, not the buyer of the car. Having incomplete kits which shuts down the assembly line is a problem.
 
N

nitros1

#13
Sounds like you need to define who your "customer" is. If you're sending kits to the assembly line, your FMEA customer is the assembly line, not the buyer of the car. Having incomplete kits which shuts down the assembly line is a problem.
well the PFMEA must show severities and effects for 3 customers:
Us- next process operation, processes.
Customer assembly line.
Final user- people buying it.

how can it shut down an assembly line, if they have like tons of inventory?

Thanks.
 

Bev D

Heretical Statistician
Staff member
Super Moderator
#14
First do not conflate occurrence rate or probability of occurrence with the severity. Severity is severity regardless of the occurrence.

Many downstream manufacturing customers do NOT have tons of inventory. In fact the automotive industry has very severe penalties for 'shutting their lines down'. A single missing part can instigate a line shutdown to determine the extent of the event.

My organization is one of those 'end of the line' manufacturers. The next person downstream from us is the user. We practice Toyota Production System and have very little inventory on hand. If you sent me boxes with missing parts that would be a very serious thing for us. It might not Pose a hazard to our users but it would put you on the non preferred suppliers list if it was a repeating event or if it were a single large event.

Second I make a bold statement that it seems that you are approaching FMEA as a 'check the box' activity and you might benefit from thinking more about the intent of an FMEA. The intent is to identify areas for improvement mitigation and control. When you start trying to rationalize these opportunities away you are gaming the system. This behavior is anti-quality. Please reconsider your motivation...
 
N

nitros1

#15
Oh ok gotcha, I will take this advices, thank you. Then, is what I ask in my first post ok or not?


Thanks.
 

Bev D

Heretical Statistician
Staff member
Super Moderator
#16
A good auditor should certainly ask about a failure mode that has "no effect".
A category 1 is typically a very low severity - not none. If all all of your failure modes were category 1 a good auditor would certainly ask about the importance of your product and/or your true understanding of how FMEA is intended to work.
 
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