The following applies to
Use
Once you have decided that a course is to take place definitely, you can firmly book it. The function firmly book automatically triggers other activities: participants receive definite confirmation of registration, candidates with waiting-list bookings are either rebooked for other courses, converted into prebookings for the course type, or remain on the waiting list.
You must use the firmly book function if you want to carry out follow-up processing for a course.
See also:
CoursesPrerequisites
Features

You can firmly book a course once only.
See also:
Booking PrioritiesIf there is a waiting list of unplaced candidates for the course, you can swap participants on the attendee list with waiting-list participants. (Bookings with essential priority cannot be swapped.) You swap bookings by selecting the participants concerned on both lists and choosing Swap selected.

You specify whichever of these two options you wish to use in Customizing for Training Management under Recurring Activities ® Firmly Book/Cancel® Control Data in the SEMIN FIXRV entry.
When you firmly book a course, you can also specify what the system response should be in a specific case, thus overriding the Customizing settings. You do so by choosing Settings ® Procedure Waiting List. This does not change the standard settings in Customizing.
See also:
Firmly Booking CoursesCourse Cancellations
Rebookings