AIAG FMEA Occurrence Criteria Issue

X

xiong_xj

#1
When I study the AIAG FMEA (4th Edition), I found an issue in occurrence criteria. The issue has been shown in the attached image.

If I follow the attached selection 1 rule, I can not determine the ranking when the occurrence rate is between 1ppm to 10ppm; And if I follow the attached selection 2 rule, I can not determine the ranking when the occurrence rate is between 50,000ppm to 100,000ppm.

Who can help to solve this problem?

Thanks a lot in advance.

Singa
 

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X

xiong_xj

#3
Dear Howard Atkins,

In FMEA handbook, there is only an occurrence criteria. But for this criteria, I can have two ways to understand it. Here I called it as "Selection 1 rule" and "Selection 2 rule". Anyway, each understanding way has ranking issue I marked it as "?" in the attached image.

I want to know how to solve this issue.

Thanks a lot.

Singa
 

Jim Wynne

Staff member
Admin
#4
Dear Howard Atkins,

In FMEA handbook, there is only an occurrence criteria. But for this criteria, I can have two ways to understand it. Here I called it as "Selection 1 rule" and "Selection 2 rule". Anyway, each understanding way has ranking issue I marked it as "?" in the attached image.

I want to know how to solve this issue.

Thanks a lot.

Singa
Where did the chart you're asking about come from?
 
X

xiong_xj

#5
Dear Jim Wynne,

This chart is writen by myself according to FMEA (4th edition) handbook. The occurrence criteria is from this handbook, and the selection 1 & 2 rules are based on my understanding but its trouble me. So I try to ask help to know how I can use the occurrence crtiteria correctly.

Thanks

Singa
 

Chennaiite

Never-say-die
Trusted Information Resource
#6
When I study the AIAG FMEA (4th Edition), I found an issue in occurrence criteria. The issue has been shown in the attached image.

If I follow the attached selection 1 rule, I can not determine the ranking when the occurrence rate is between 1ppm to 10ppm; And if I follow the attached selection 2 rule, I can not determine the ranking when the occurrence rate is between 50,000ppm to 100,000ppm.

Who can help to solve this problem?

Thanks a lot in advance.

Singa
I am pretty much sure your issue is not any different from what was raised in this thread. Just check if that helps.
 

Rameshwar25

Quite Involved in Discussions
#7
Dear
The table given in FMEA manual is very confusing. I could not make a table which could satisfy >=100000PPM and less than 1 PPM. However, to ease the FMEA process, I have prepared the table which is attached herewith.
the PPM level more than 50,000 and below 100000 will be 9 because 10 is for more than or equal to 100000.

Regards
Rameshwar
 

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