Machine Feature: Is it possible to consider it Error Proofing?

M

mayank_thkkr

#1
Hi,

I am confused whether or not to consider inbuilt machine feature as Error Proofing and identify them as current preventive control ??

:thanx:
 
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D

DrM2u

#2
Well, you could use this as an example of error proofing if you specified the equipment with certain features that would eliminate the errors you are talking about. An auditor might challenge your position if the features are standard for the equipment, or if the features were not specified on the request for quote, the purchase order, IQ, OQ, or any other internal document related to the selection of the equipment. In other words, "prove to me that you had this error proofing in mind when you selected this equipment in particular".
 

Jim Wynne

Staff member
Admin
#3
Hi,

I am confused whether or not to consider inbuilt machine feature as Error Proofing and identify them as current preventive control ??

:thanx:
BEcause you've posted this in the FMEA forum, I'm assuming that you're referring to the PFMEA Occurrence factor. If you have identified a potential failure mode, and a feature of a machine prevents the failure from occurring, I don't see why you shouldn't consider it an error-proofing feature.

On page 93 of the 4th edition AIAG FMEA manual, there's a table that gives guidelines for determination of the Occurrence number. In order to assign a "1," the criterion given in the table is "Failure is eliminated through preventive control."
 

Jim Wynne

Staff member
Admin
#4
Well, you could use this as an example of error proofing if you specified the equipment with certain features that would eliminate the errors you are talking about. An auditor might challenge your position if the features are standard for the equipment, or if the features were not specified on the request for quote, the purchase order, IQ, OQ, or any other internal document related to the selection of the equipment. In other words, "prove to me that you had this error proofing in mind when you selected this equipment in particular".
If a given control prevents a failure mode from occurring, it doesn't matter whether it was specified for that purpose or not.
 

qusys

Trusted Information Resource
#5
Hi,

I am confused whether or not to consider inbuilt machine feature as Error Proofing and identify them as current preventive control ??

:thanx:
As Jim said, I think you can as per AIAG guideline for FMEA..
Is the risk acceptable for you looking at RPN or should you still search for recommended actions, working at occurrence and detection?:bigwave:
 
T

TShepherd

#6
The short answer is yes - assuming that when you mean that the Machine does not allow the error to occure - if the machine only catchs the error and stops the process from passing the non-conformity on it commonly know as Mistake Proofing and would result in a different RPN outcome.



Tom :2cents:
 

Jim Wynne

Staff member
Admin
#7
The short answer is yes - assuming that when you mean that the Machine does not allow the error to occure - if the machine only catchs the error and stops the process from passing the non-conformity on it commonly know as Mistake Proofing and would result in a different RPN outcome.



Tom :2cents:
Good point. The difference is between Occurrence and Detection. If the machine feature prevents the bad thing from happening, it affects the Occurrence factor; if it detects the bad thing after it happens, it affects the Detection factor.
 
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