Why do you ask?
Because I assumed you were suggesting me to read an unspecified FMEA book. Is it some fundamental book used in the automotive industry? I guess I'm not enlightened since I'm not working with vehicles, and in a way I envy quality people in the automotive industry for having all the quality tools quite prepared for their needs...
So sorry, sometimes we get a little too brief on the Cove with our acronyms and all.
AIAG.com is the website for the Big 3 US automotive companies. They published a FMEA guide manual that is a very useful document for anyone who want to use FMEAs as a planning tool, automotive or not. They will sell to the public as well. You do not need to be a member.
OK. I will see what they got and perhaps order their book as well. Thanks.
For example, a dull stamping die could leave a sharp burr. That burr could have a significant impact on either the assembly plant or possibly the end user, when that part is assembled on the vehicle. So, it would get a fairly high Severity number.
If a burr can cause problems downstream, it's the responsibility of the designer(s) to make sure that the potential problem is addressed in the specifications. If it is, then it's possible that there's nothing to be gained by giving potential burrs a high severity number in the PFMEA.