D and P-FMEA example for review.

Wujinn

Starting to get Involved
Hello, I have prepared a flowchart of the process and FMEAs. Could you take a look and point out any mistakes in the methodology?
To clarify, this is a hypothetical process, and the main goal was to apply the methodology, so let's assume that these documents are complete in terms of possible failure effects (FE), failure modes (FM), and failure causes (FC). I used "X" to limit my analysis because there was no point in filling all the cells.
I wasn't sure how to approach the failure effects caused by the end customer, so I marked them in yellow and would appreciate some guidance.
All comments and suggestions are highly welcomed.

I attach:
1) General process flowchart
2) Simplified technical drawing
3) Photo of the product
4) DFMEA and PFMEA worksheet
D and P-FMEA example for review.
D and P-FMEA example for review.
 

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  • Product drawing.pdf
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  • FMEA worksheet.xlsx
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Tidge

Trusted Information Resource
I looked at the Yellow Cells, I only found them in the DFMEA. Those failure modes read to me as if you are designing the (large scale) equipment itself in this example? I'm confused because the product drawing/photo looks to be something far less than 7 tons.
 

Wujinn

Starting to get Involved
I looked at the Yellow Cells, I only found them in the DFMEA. Those failure modes read to me as if you are designing the (large scale) equipment itself in this example? I'm confused because the product drawing/photo looks to be something far less than 7 tons.
That is correct, the yellow cells are in the DFMEA.
Your observation is valid. I wasn't focusing too much on providing accurate numbers in terms of material strength. The emphasis was more on the FMEA methodology, which is described in reference books. There might be some technical aspects that are not right.

To clarify, the object of the analysis is just the metal plate.
 

Wujinn

Starting to get Involved
Can you explain the concern about the 10-ton weight?
Sure.
When this amount of weight will be applied plate might crack.
It may cause movement of the machine and in the worst case it can harm somebody. Since it's safety related Severity is 10.
 

Wujinn

Starting to get Involved
Is it even possible to fit a 10-ton plate onto the press? Or is it that the press can generate more than 10 tons?
Once again, my goal was not to provide ideal numbers – those numbers don’t really matter.

This topic is about the FMEA methodology, not feasibility. If there is information stating that this plate is able to handle 10 tons, please assume that it can handle that weight.
The assumption is that, from both a processing and material strength perspective, this process and product are correct. It's not important whether this plate can handle 100 kg, 5 tons, or 20 tons, or wheteher the press can do it.

I have stated that it can handle a maximum of 10 tons, so please assume that it can do that. The same applies to the process – let's assume it is feasible in terms of achieving these characteristics.

I'm not trying to design the process as close to reality as possible; I need feedback on my application of the rules found in the VDA & AIAG reference book.
 

Jimmy123

Involved In Discussions
Hello, I have prepared a flowchart of the process and FMEAs. Could you take a look and point out any mistakes in the methodology?
To clarify, this is a hypothetical process, and the main goal was to apply the methodology, so let's assume that these documents are complete in terms of possible failure effects (FE), failure modes (FM), and failure causes (FC). I used "X" to limit my analysis because there was no point in filling all the cells.
I wasn't sure how to approach the failure effects caused by the end customer, so I marked them in yellow and would appreciate some guidance.
All comments and suggestions are highly welcomed.

I attach:
1) General process flowchart
2) Simplified technical drawing
3) Photo of the product
4) DFMEA and PFMEA worksheet
View attachment 30870 View attachment 30871
I think Excel is terrible to handle all the information and the reason to oversee important points. What I concern, you have in the PFMEA the 4M deep blue columns, therefore this color coding column with the functions must have at least the same or mostly more amount of rows.
 

AndrewK

Involved In Discussions
in addition to excel format, prior to filling table i would recommend to make some matrix like on picture- for better understanding
D and P-FMEA example for review.
 
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