Number 8:

Number 9:

Answer number 9 using excel with formulas

Figure 2.1. Arrival 100000 0.4 1.0 0.9 Registration 0.6 Exam Rooms Normal Exit 0.1 Sign In 1.0 1.0 Trauma Rooms Treatment Rooms In the urgent-care clinic of Figure 2.1, suppose that the patients arrive from outside into the clinic (coming from the upper right corner of the figure and always into the Sign In station) with interarrival times that are exponentially distributed with mean 6 minutes. The number of individual servers at each station and the branching probabilities are all as shown in Figure 2.1. The service times at each node are exponentially distributed with means (all in minutes) of 3 for Sign In, 5 for Registration, 90 for Trauma Rooms, 16 for Exam Rooms, and 15 for Treatment Rooms. For each of the five stations, compute the local traffic intensity eStation there. Will this clinic "work," i.e., be able to handle the external patient load? Why or why not? If you could add a single server to the system, and add it to any of the five stations, where would you add it? Why? Hint: Unless you like using your calculator, a spreadsheet or computer program might be good, or perhaps use mmc.exe. In Problem 8, for each of the five stations, compute each of Wg, W, L9, L, and p, and interpret in words. Would you still make the same decision about where to add that extra single resource unit that you did in Problem 8? Why or why not? (Remember these are sick people, some of them seriously ill, not widgets being pushed through a factory.) Hint: Unless you really, really, really like using your calculator, a spreadsheet or computer program might be very good, or maybe you could use mmc.exe