PFMEA (Process FMEA) Detection Scale - Aerospace engine components

C

Charlie H

#1
Hi All,

With all the reading I've done on FMEA I still have questions.

1. When it comes to detectability, is rated on the present operation or one further into the process?

2. If the product is complex (aerospace engine componets), should the whole process be done at one time or one operation at a time?

3. How do you rate an operation of the process if an earlier operation is addressed with a high RPN?

Sorry if I seem greedy with my questions but I'll stop here for now.
 
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Stijloor

Staff member
Super Moderator
#2
Re: PFMEA detection scale

Charlie,

No you're not greedy with questions, that's why we're here to help you.

I am a little hesitant to respond to your post because most of my FMEA experience is with automotive suppliers. You mentioned aerospace components and that made me somewhat reluctant...

However, some of of our Fellow Covers have a lot of aerospace experience, so I let them go first. ;)

What guidance document do you use for your FMEA process?

Stijloor.
 
C

Charlie H

#3
Stijloor,

I'm not sure what you mean by guidance document. Im sure once you tell me I'll kick my self for not thinking of it. But I'm new to Conituous Improvement and my company is new to FMEA.

So even if everybody out there are not experts, taking a wild guess at it might help for some good conversation on the topic at least.
 

Ajit Basrur

Staff member
Admin
#4
Charlie,

No you're not greedy with questions, that's why we're here to help you.

I am a little hesitant to respond to your post because most of my FMEA experience is with automotive suppliers. You mentioned aerospace components and that made me somewhat reluctant...

However, some of of our Fellow Covers have a lot of aerospace experience, so I let them go first. ;)

What guidance document do you use for your FMEA process?

Stijloor.
I think the aerospace industry use the same FMEA concepts as automotive as I had read an article that the current FMEA concepts were derived in the 1960s during the Apollo programs. :)

Hi All,

With all the reading I've done on FMEA I still have questions.

1. When it comes to detectability, is rated on the present operation or one further into the process?

2. If the product is complex (aerospace engine componets), should the whole process be done at one time or one operation at a time?

3. How do you rate an operation of the process if an earlier operation is addressed with a high RPN?

Sorry if I seem greedy with my questions but I'll stop here for now.
I am not an expert so would to direct you to refer the various threads that we have on related subject. Use the SEARCH function to get more responses. Being a weekend, the response would be bit slow than usual.
 
R

Roger Thorpe - 2008

#5
Charlie H,

Hi,

I joined the forum today and think I may be able to help.

My background has also been automotive for the last 13 years as an FMEA consultant to that sector. However I also work in Motorsport, genral purpose industrial, railway support, healthcare and banking sectors. Some of my customers also supply the aerospace industry.

Firstly, the 'book that others have refered to in automotive terms is the QS9000 - FMEA 4th edition handbook as the industry reference standard. Is there an equivelant for the aerospace sector? There maybe, although I've yet to find one. I believe that most sectors look to the automotive sector as 'leading the way' when it comes to FMEA.

Now to your questions.

1. Detection - the issue of what it is, how useful it is and geographically where it is located in the process. In short the further it is from the process step being considered the less useful, because you add value to the product before it reaches your detection point. Equally to suggest you don't have anything when afew steps later in the next process (even if it is not the one being considered) would be misleading.

2. This question is a universal one not just constrained to your situation.
My recommendation is simple and adopted repeatedly over the last 10 years. Use a modular approach. Identify your core processes and match modular Process FMEAs to each of them ensuring there are no overlaps and no gaps.
Typical areas would be Manufacturing, assembly, goods in, packing/shipping and logistics. The first two are likely to be further subdivided as necessary.

If you need a more precise answer contact me directly with details of your 'core processes'

3. Please can you re-phrase this question as I am unclear as to what is meant, sorry.

Oh, by the way your by not greedy, bring it on, what's your second group of questions?

Trust this helps

Roger
 
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