midterm 2a solved spring 07

midterm 2a solved spring 07 - Questions [40 points, 4...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Questions [40 points, 4 points each] 1. Consider an M/M/k queue with arrival rate λ and service rate μ and an M/G/k queue with the same arrival rate λ and service rate μ . a. Which of these two queues has a larger Lq? Cannot tell b. Which of these two queues has a higher utilization rate ρ ? Same 2. Which of the following is not needed for the calculation of the EOQ? a. Setup/ordering cost b. Lead-time c. Holding cost d. Demand e. None of the above 3. Which forecasting method below should perform better given the following data? 20 70 120 170 220 270 320 0 2 4 6 8 10 12 14 Months Actual Sales Data a. Moving average with a small N. b. Moving average with a large N. c. The seasonality method in the slides. d. Exponential smoothing with a large alpha. e. Exponential smoothing with a small alpha 4. Please complete the following: a. Anxiety makes waits seem longer . b. Pre-process waits feel longer than in-process waits. c. Uncertain waits feel longer than known/finite waits. d. Unexplained waits feel longer than explained waits. e. Unoccupied waits feel longer than occupied waits.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
5. Which of is the following is NOT an assumption of the EOQ model? a. The lead-time is constant. b. The unit cost is constant. c. Demand is known/constant. d. The ordering/setup cost is constant. e. None of the above 6. Which of the following is NOT true about the EOQ model? a. In some cases, the unit cost is not used in calculating the (annual) inventory holding cost per unit. b. The average inventory level is always Q/2 regardless of the lead-time. c. When the lead-time is longer than an inventory period/cycle, the EOQ formula must not be used. d. If the order quantity equals the EOQ then the holding and ordering/setup costs will also be (about) equal to each other, on an annual basis. e. None of the above. 7. You are an employee of the USC Credit Union currently assessing the minimum number of ATMs required at the Student Commons lobby to ensure that the probability a customer will have to wait for an ATM will be less than 35%. A previous statistical study determined that customers arrive ac- cording to a Poisson process at the rate of 24 per hour and the average amount of time a customer spends using an ATM is 5 minutes and follows an exponential distribution. What should be your an- swer? a. 3 b. 4 c. 5 d. 6 e. Cannot be determined with only the information above. 8.
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/15/2007 for the course BUAD 311 taught by Professor Vaitsos during the Spring '07 term at USC.

Page1 / 6

midterm 2a solved spring 07 - Questions [40 points, 4...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online