Operation Management

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Q1: A manufacturer’s average work-in-process inventory for a certain part is 1,000 units. The workstation produces this part at the rate of 200 units per day. What is the average time a unit spends at this workstation? Inventory, , Throughput, . Thus, Flow time, . A unit spends an average time of 5 days at this workstation. Q2: The Wilcox Student Health Center has just implemented a new computer system and service process to “improve efficiency.” As pharmacy manager, you are concerned about waiting time and its potential impact on college students who “get no respect.” All prescriptions (Rxs) go through the following process: Drop-off ! Fill Rx ! Pick-up ! Cashier Assume that students arrive to drop-off Rxs at a steady rate of 2 Rxs per…show more content…
At his or her turn, each patient is seen by a doctor and then exits the process, either with a prescription or with admission to the hospital. Currently, 50 people per hour arrive at the ER, 10% of whom are admitted to the hospital. On average, 30 people are waiting to be registered and 40 are registered and waiting to see a doctor. The registration process takes, on average, 2 minutes per patient. Among patients who receive prescriptions, average time spent with a doctor is 5 minutes. Among those admitted to the hospital, average time is 30 minutes. On average, how long does a patient stay in the ER? On average, how many patients are being examined by doctors? On average, how many patients are in the ER? Waiting Waiting Doctor check-in to be Registration to see a Hospital Prescription registered doctor 30 p 1.67 p 40 p 2.5 p 3.75 p 50 p/h 50 p/h 50 p/h 5 p/h 45 p/h 36 min 2 min 48 min 30 min 5 min Table 2: Find Missing Data Using Little Law. Average time that a patient stays in the ER (see Table 2) ( ) ( ) Average number of patients examined by doctors (see Table 2) Average number of patients in the ER (see Table

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