Functional block diagram software
TDC Structure is a software meant to assign service functions to components of the various technical solutions the designer imagined.
The functional block diagram (FBD) helps you identify the internal technical functions (closed flow) inferred by the design. These functions will then be handled in TDC FMEA if an FMEA is your goal.
The Functional Analysis Chart (FAC) allows you to assign component costs to the functions.