During my time with the Hercules fleet the monthly tasking would arrive on the squadron and be passed on to the various sections. As the ALM leader I was then responsible for allocating loadmasters to fulfil the tasking. Who I chose for any particular task was dependent on a number of factors. Qualifications, experience etc were all to be taken into account.
As you can see the tasking was done 'at the coal face' in my time.