Small ad-hoc charter airline with L1011 equipment.
Few MEL items, most quite minor in nature.
We carry three ground engineers everywhere we go, and in addition, a fly away kit is in the rear lower compartment.
IF the aircraft needs service, it is accomplished, period.
Occasionaly, we dispatch with an unserviceable APU, however, this is a ten day item, so on RTB, it is fixed or replaced.
Fuel.
I take what I need, no questions asked.
If this means that payload is offloaded/not accepted (very unusual, however) it is done, also, no questions asked.
Occasionally, to accept payload, we might offload the fly away kit, however, this is also very unusual.
In the last year, we have had 99% dispatch reliability.