FMECA Analysis may be performed differently for different mission phases/profiles. For example, some device may have different failure modes and their effects between ground operation and airborne operation - so you should create two different FMECA data sets, one for each phase.

 

You may define multiple phases on the "Phases" page of FMECA Library (see FMECA Libraries paragraph) - for each  phase you should define its name, description and duration in hours:

 

Then you may select phase of current analysis and switch between phases on the Project Configuration screen:

 

When you start a new project, there is one default phase called "Default" with duration of 1 hour - change the phase definition, duration and add additional phases if required into FMECA Library.