The FMEA steps such as defining the scope, developing system structures and functional analyses are more likely to succeed with boundary diagrams. Boundary diagrams are part of the tools of every experienced FMEA moderator.
The Boundary Diagram: Better System and FMEA Design with Block Diagramsread more
Block Diagram FMEA Boundary Diagramread more
A boundary diagram represents all the interfaces of a system in the form of a block diagram. It is the useful introduction to aFMEA, as the functions of a system (along with the failures) are implemented on the interfaces.
Functions and Requirements in FMEAread more
Against the mixing of functions and requirements in FMEA