The Process FMEA should be continually updated as changes occur throughout all phases of product development and on into and through to the end of production.
The Process FMEA should begin with a flow chart of the processes - from receiving through shipping and warehousing.
The Potential Failure Modes/Causes which can occur during manufacturing or assembly process are covered by the Process FMEA but some information (severity rankings, identification of some effects) may come from the Design FMEA.
A reduction in occurrence ranking can only be achieved by implementing a process change that controls or eliminates one or more causes of the failure mode.
