The Relative Timings of the Inventory-Evaluation - Machine-Repair Model - Management Assignment Help

Assignment Task:

Task:

1) In Model 5-4, the relative timings of the inventory-evaluation interval and the delivery lag were such that at no time could there be more than one order outstanding. What if the numbers were different so that there could be multiple orders on the way at a given time? Would Model 5-4 still work? (Note that in Model 5-4 we represented the order quantity, if any, by an attribute of the inventory-evaluator entity; what if that order quantity had been represented instead by a variable?)

2) In the machine-repair model of Exercise 3-14, suppose it costs $80 in lost productivity for each hour that each machine is broken down and $19/hour to employ each repair technician (the technicians are paid this hourly wage regardless of whether they are busy or idle). Modify the model to collect these cost data, and report the average total cost per hour. Also, show the machines in the “up” state in a separate area of the animation, make separate animation pictures for up vs. down machines, and keep track of the number of machines up (and plot it). Make the number of machines in the shop a Variable. If youwant to minimize total average cost, is two the right number of repair technicians? Experiment (though see Exercise 6-21 for a statistically valid way to experiment).

Machine-repair model:

Five identical machines operate independently in a small shop. Each machine is up (that is, works) for between 7 and 10 hours (uniformly distributed) and then breaks down. There are two repair technicians available, and it takes one technician between 1 and 4 hours (uniformly distributed) to fi x a machine; only one technician can be assigned to work on a broken machine even if the other technician is idle. If more than two machines are broken down at a given time, they form a (virtual) FIFO “repair” queue and wait for the first available technician. A technician works on a broken machine until it is fixed, regardless of what else is happening in the system. All uptimes and downtimes are independent of each other. Starting with all machines at the beginning of an “up” time,

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