If only that was the way the tasking was set. when in reality it is just done on numbers of aircraft each squadron "should" have. Not taking into account how many aircraft there actually are, how many staff, number of days you're booted off your airfield, how versatile the airfield is or any other factors.
Tingger - it is that simple. If you can't do it safely - eg. within resource - then don't do it!
There are plenty of Squadron Commanders that have told their HQs that they can't do the task due to a lack of capacity or support - including a rather famous one with 2 tin legs! One thing, though, you have to have your facts straight if you make the call.
The B Word