Using Monte Carlo simulations to optimise pharmaceutical production schedules?

I just want a justification for using Monte Carlo simulations and some kind of easy example of how its used. The schedules will take into account people, materials, machines and their varied availability so lots of unknown variables like peoples availability, a few different types of drugs being made on shared equipment/machines in the plant.
      At first I proposed using Generic Algorithms but my supervisor said this is too complex.  My supervisor wants me to give him a justification for using monte carlo simualtions backing up my argument using references from recent research papers