Type ratings. Develop a flexible lesson plan that focuses on strengthening a student’s weaknesses and avoids wasting simulator time on aspects they are already competent at. No brainer.
It's not that simple. Syllabi are approved by the regulator and all items need to be completed. The actual execution of the lesson plan is done around the strength and weakness of the trainee provided the skill defficiency is within a certain limit. What needs to be flexible is the total number of sessions.