Do the inspection stages in flow chart also need to come out the FMEA?

[jj1234]

Dear sirs;
I have one question regard to flow chart vs PFMEA. As we knew, the PFMEAs should come out with flow chart step by steop. If one flow chart like as below with inspection stahes, do inspection stages also should have its FMEA or we just skip inspection stage when come out the PFMEA.

Material incoming inspection -->Process 1-->inspection A-->Process 2-->Inspection 2

Hope you can give me the suggestion

Thanks

[Al Dyer]

Welcome,

I would say that flow charts are the visual map of what happens. The PFMEA is the thought process (documented) leading to the actual process that can be delivered by a flow chart.

Al...

[Govind]

Originally Posted by jj1234

Dear sirs;
I have one question regard to flow chart vs PFMEA. As we knew, the PFMEAs should come out with flow chart step by steop. If one flow chart like as below with inspection stahes, do inspection stages also should have its FMEA or we just skip inspection stage when come out the PFMEA.

Material incoming inspection -->Process 1-->inspection A-->Process 2-->Inspection 2

Hope you can give me the suggestion

Thanks

This is a tricky question.

Example: If the inspection step is a visual inspection, we do not consider it as a step to go through failure mode, cause, effect, severity, Occurrence and detection.
If the process involve clamping the part or loading in an inspection fixture, then Yes. This may cause certain failure due to excessive clamping or scratching a polished surface.
I suggest,we have to evaluate the situation and decide whether the inspection step should be included in a PFMEA.

Regards,
Govind.

[Bill Ryan]

Welcome to the Cove

All "Sequence" steps shown in the Flow Chart show in both my PFMEAs and Control Plans. Questions for those not doing so - Can an operator misread a gage? Can a gage "misread" a part? Regarding visual inspection - Are the visual controls adequate/current? These three questions are "Potential Causes" in the PFMEA (at least in my methodology) relating to "Failure Modes" of passing a defective part or rejecting an acceptable part.

Just my

Bill

[The Taz!]

Originally Posted by Bill Ryan

Welcome to the Cove

All "Sequence" steps shown in the Flow Chart show in both my PFMEAs and Control Plans. Questions for those not doing so - Can an operator misread a gage? Can a gage "misread" a part? Regarding visual inspection - Are the visual controls adequate/current? These three questions are "Potential Causes" in the PFMEA (at least in my methodology) relating to "Failure Modes" of passing a defective part or rejecting an acceptable part.

Just my

Bill

I'm with you Bill. . .

[ralphsulser]

I agree with Bill and Taz, each step of the inspection stage contribute to the probability of detecting a failure, and visual inspection should be considered since it is part of the process, and shown on the flow chart. Visual criteria must have been established for inspection for accept/reject correct?

[The Taz!]

Also consider customer input regarding the Visual Inspection Detection score. Some customers will not allow a score less than a 5 for visuals. This should be defined during the APQP process.