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View Full Version : Seeking: FMEA Beginners Guide - PCB Design and Assembly


Chris May
21st November 2002, 05:09 AM
Hi guys,

It seems that the FMEA tools are primarily aimed at the automotive industry, but can be used elsewhere.

We are in the design and assembly of heating control systems and the most problematic parts are the PCB assemblies.

Has anyone in the PCB assembly arena instigated FMEA on board design and / or assembly processes and would they be willing to share ??

Also, where can I find an "Idiots Guide" or "Beginners Guide" to FMEA.

I have quickly searched and browsed the forums, but the topics are well in advance of what I require.

FMEA is not a requirement for us as a company, but from the little I have read, it could be a useful tool....

Regards,

Chris.

Geoff Cotton
22nd November 2002, 05:07 AM
Chris,

Our plant is in Birmingham. Give me a call, I lend you a helping hand.


PS. read your 'private message'

Sam
22nd November 2002, 09:30 AM
s An example of military requirements is MIL STD 1629. I tried to attach, but file is too big. You can get it free from the web.

Randy
22nd November 2002, 11:05 AM
Jim,

What's the cost of that book in real money?:vfunny:

Douglas E. Purdy
22nd November 2002, 11:17 AM
Chris May,

This is not an 'Idiot's Guide' to FMEAs, but I do find that walking through the Process Flow (see attached SAMPLE), with the Process Owners and identifying the Sources of Variation at each applicable step is a good beginning for generating an FMEA.

Bill Ryan
22nd November 2002, 12:20 PM
Chris May

Good luck!!!!!!!!!!!!!

Performing an FMEA excersize (and actually doing it right!!) is one of the "driest, most painful" things a human being can put themselves through.

It is also one of the best tools you can use to document the risks your product could "potentially" expose you to. The Big3 did not "invent" the FMEA, they "adopted" it. It has been a great engineering tool since the '50s, I believe. But it is only a tool to write down (document) the thought process an engineer goes through on a daily basis.

I am a strong proponent of the FMEA and have recently made inroads here to, truly, make the FMEA a "living" document. I think you may be surprised at what you might learn going through the process.

I'm going home now - have a great weekend, all.

Bill

Angela-2007
22nd November 2002, 12:32 PM
Since you guys are on the subject..... Doe you interpret the requirements to be that you have to utilize FMEA's and control plans?

All answer appreciated

Angela

Bill Ryan
22nd November 2002, 12:38 PM
Angela

Each one of your customers will tell you if it's a requirement. ISO/TS do not specifically, explicitly say that you "shall" have FMEAs for your parts.

Bill

Angela-2007
22nd November 2002, 01:49 PM
O.K. I just called my registrar to find out what their standings are on the FMEA requirements. They tell me that FMEA's are a requirement. According to them element 4.2 subelement 4.2.3.1 Advance Product Quality Planning states that "Teams actions should include: Development and review of FMEAs" and that subelement 4.2.3.5 Process Failure and Effects Analysis states that "Process FMEAs shall consider...." According to them their interpretation is that it is a requirement. Am I off. I don't see it. I have to be honest, we have FMEA's. Are they useful. NO. Do any of the employees utilize them. NO. Is anyone that is ISO-9002/QS-9000 not using FMEA's? What does your registrar say?

Angela

D.Scott
22nd November 2002, 03:23 PM
Angela - We are QS and use FMEA/CP extensively. It is a requirement of PPAP and we find it a useful tool in our APQP process. We do not however use FMEA on every new part.

QS does not require FMEA outside the PPAP requirement. It is offered as a prefered technique in APQP but because it is a "should", you would be allowed to use an alternative technique.

The requirement is that you have an APQP process. Some techniques are listed as "should" but it states "Similar techniques that accomplish the intent are acceptable".

Dave

Sam
25th November 2002, 09:21 AM
Angela,
I think 7.3.3.2 of TS2 may be what you are looking for.

Allie
29th November 2002, 10:40 AM
I just wanted to confirm this:

The FMEA compliments the Control plan. So there should be no problem grouping like processes on the process FMEA. Please tell me I can group like parts together in the Process FMEA.

Allie
29th November 2002, 10:40 AM
I just wanted to confirm this:

The FMEA compliments the Control plan. So there should be no problem grouping like processes on the process FMEA. Please tell me I can group like parts together in the Process FMEA.

Allie
29th November 2002, 10:41 AM
oops, sorry about the double posting. Not sure how that happened.

Bill Ryan
2nd December 2002, 09:37 AM
Please tell me I can group like parts together in the Process FMEA.

Sure you can - If it works for you. It can get a little "hairy" if Failure Modes are not common across all the parts you "group".

From a semantics angle, the PFMEA (when "properly" done) WRITES the Control Plan. I guess I'm just a little uncomfortable with the phrase that the two documents are "complimentary".

Bill