The Design FMEA is a living document and should be initiated at, or by, design concept completion.
The Design FMEA should be continually updated as changes occur throughout all phases of product development.
The Design FMEA should be fundamentally complete along with the final product drawings.
The Design FMEA addresses the design intent and assumes the design will be manufactured / assembled to this intent.
The Potential Failure Modes/Causes which can occur during manufacturing or assembly process are covered by the Process FMEA and therefore should NOT be included in a Design FMEA.
