This lists the Resources required at a particular Activity.
Optionally you can instruct the Activity to release Resources as soon as the Activity has finished work, or, alternatively, to hold onto the Resources until the Work Item can leave the Activity. (This will not be the same time if the Activity is blocked).
If Simul8 cannot find one or more of the Resources it will not actually hold ANY of the Resources. It always waits until all are available before taking any.