Whether the deadbolt was thrown.
A door pulled closed on its latch is usually the fastest and cheapest outcome. A deadlocked door requires picking, decoding or drilling.
Lock type and security features.
High security cylinders with anti pick and anti bump protection are designed to resist the same techniques used for
non destructive entry. They take longer and sometimes cannot be opened without drilling.
Whether a key has broken in the cylinder.
Extraction is additional work beyond opening the door.
Whether the lock has failed mechanically.
A seized mechanism or sheared cam means
the lock needs replacing, not just opening.
Access.
A security screen in front of the door, a secured building entrance, or a door at the rear of a property with limited access all add time.