In the hand simulation of the simple processing system, suppose that the queue discipline were changed so that when the drill press becomes idle and finds parts wait- ing in queue, instead of taking the first one, it instead takes the one that will require the shortest processing time (this is sometimes called an SPT queue discipline). To make this work, you'll need to assign a second attribute to parts in the system when they arrive, representing what their service time at the drill press will be. Redo the hand simulation. Is this a better rule? From what perspective?