A comprehensive, well-done FMEA can be considered one of the inputs (plus many other preparations sheets defined in the methodology) to decide the scope of a DRBFM but an FMEA is not required since the focus is based on the changes and interfaces.
A thorough, well-executed FMEA can be considered one of the inputs (alongside many other preparation sheets outlined in the methodology) to determine the scope of a DRBFM; however, an FMEA is not necessary since the emphasis is on changes and interfaces.