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How to complete structure Analysis and Function analysis sections' columns of AIAG-VDA DFMEA form


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Hello all,

We are implementing a DFMEA base on new AIAG-VDA FMEA Handbook on a gearbox part, namely “gears 1&2 Fork”. The part picture is s follows:
Fork 1-2 pic.jpg

This part is an element of a gear change sub-system in a gearbox system.

The part has a functional drawing which defines the layout of the part and some endurance tests and their expected results.

we completed steps 2 and 3 of the DFMEA form as follows:

Structure and Function Analysis.JPG

As you see we left some columns in the form.

My questions are:

1. Is it allowed to leave columns 1 and 3 blank in structure analysis or function analysis sections when we are implementing DFMEA for a component? (only filling Focus element columns)

2. What is the meaning of characteristic type in column 3 (Next lower level or characteristic type) of structure analysis section?

3. What is the meaning of characteristic in column 3 (3.Next lower level function and requirement or Characteristic) of structure analysis section? Is it different from Requirement?

Thanks all.
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