as follows:

(a) After drilling, each part goes immediately to a polishing station, where a single person hand-polishes the part. Polishing times are (continuously) uniformly distributed between 5 and 15 minutes. Animate both the queue and the resource for polishing. For the resource animation, open some of the other picture libraries (in the Arena folder that’s in turn inside the Rockwell Software folder) like People.plb or Workers.plb ; have an appropriately different resource picture for the idle and busy states of each resource.

(b) After polishing, each part goes immediately to a shipping station, where a single person hand-prepares the part for shipping. Shipping-preparation times are always exactly 7.5 minutes per part. Animate both the queue and the resource for shipping preparation, similarly to what you did for polishing.

(c) For both the queue-length and number-busy plots, add curves (on the same set of axes, so don’t create new plots) depicting the two new stations. Use different colors for the curves within each plot, and add a legend to each plot to show which station is which color in the plot. From your results (one replication), f ll in the following table and put it into your model in an Arena text box: Drilling Polishing Shipping Avg. time in queue xx.xx xx.xx xx.xx Avg. queue length xx.xx xx.xx xx.xx Utilization xx.xx xx.xx xx.xx Average total times in system by part type: Blue avg. time in system xx.xx Green avg. time in system xx.xx Red avg. time in system xx.xx Speculate on what would happen if you ran your model for a far longer time (or, go ahead and try it). If you could hire one more person to work as a second driller, a second polisher, or a second shipper, what would you do, and why? (Add your brief answers to these two questions to your model in the previous text box.)