What are the FSL optimization types and when do you use each?

FSL provides four optimization types:

1. Global Optimization — reschedules all unscheduled and scheduled appointments across the full horizon; used for initial schedule builds or major replanning.
2. Overnight Optimization — runs automatically overnight to build the optimal schedule for the next day before technicians start work.
3. In-Day Optimization — re-optimizes the current day's remaining appointments in real time as cancellations, new requests, or delays occur.
4. Resource Schedule Optimization — optimizes the schedule for a single named resource, useful when a specific technician's day needs to be replanned without affecting others. All optimization types use the configured Scheduling Policy (service objectives and work rules) to generate the optimal schedule.