Global Optimization will not move appointments that are pinned by status, pinned by checkbox, or otherwise constrained by their own scheduling parameters such as an Arrival Window the customer already agreed to.

Option A is correct. Once an Arrival Window is defined on a Service Appointment, the optimizer treats the start time as fixed within that window. If most appointments already have tight Arrival Windows, the optimizer has very little room to move them.

Option B is correct. Appointments in a 'Pinned' status (configured under Field Service Settings → Optimization → Pinned Statuses) are excluded from optimization moves entirely.

Option D is correct. The 'Pinned' checkbox on the Service Appointment locks the appointment to its scheduled time, regardless of status. Optimization will not move pinned appointments.

Option C is incorrect because if appointments are scheduled in violation of Work Rules, optimization would typically reschedule them to a compliant slot, not leave them in place.

Option E is incorrect because high priority makes appointments more important to schedule, not less likely to move; the optimizer is free to relocate high-priority work.