If lowering arises from previous high internal effects which had an impact on the ultimate value in SEV column, then the answer is yes; nevertheless two cases are taken into consideration:
- DFMEA was not available and Unknown Function (10) was entered; during further revisions there was an update to include available data from the existing DFMEA.
- During tests and validation, previously assessed effects turned out to be too strict and thus overstated SEV value.
Please remember: at present the ultimate SEV value in PFMEA is affected by results from at least three effect fields: internal, external and user.
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