illustrative_exam1_solution

illustrative_exam1_solution - Illustrative Exam 1...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Illustrative Exam 1 Questions 1 Solutions BUAD311 – Operations Management Fall 2009 Hiroshi Ochiumi Section A: Multiple Choices Circle only one. 1. Which of the following statement is correct? a) Make-to-order systems are better than make-to-stock systems. b) Make-to-stock systems are better than make-to-order systems. c) Hybrid systems are perfect and better than both MTO and MTS systems. d) Hybrid systems are worse than both MTO and MTS systems. e) None of the above e) 2. According to Little’s Law, a restaurant owner may increase the revenue by a) reducing the throughput rate b) having larger space and higher WIP c) having smaller space and lower WIP d) increasing the time customers staying in the restaurant e) None of the above b) 3. To improve the utilization rate, we can I: Cross-train the workers II: Adopt flexibility equipments III: Shift from MTS systems to MTO systems Choose the most appropriate. a) I b) II c) III d) I and II e) I, II, and III d) 1 These are all actual questions that appeared in past exams. Note we may be covering slightly different materials this semester.
Background image of page 1

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

View Full DocumentRight Arrow Icon
2 4. Hotel guests usually complain about the long waiting times for the elevators. Which of the following may help to improve customers’ waiting experience? I: Install more elevators II: Upgrade to faster elevators III: Install mirrors near the elevators a) Only I may. b) Only II may. c) Only III may. d) I and II may, but not III. e) All the three may. e) 5. The operator of a coffee stand has noticed that over the past week the utilization at the stand has increased from 0.6 to 0.75, and as a result the average total amount of time a customer spends there (in line and in service) has increased by one minute and a half. If the utilization increases next week to 0.9, the average total time will: a) decrease. b) increase by less than one minute and a half. c) Increase by exactly one minute and a half. d) increase by more than one minute and a half. e) None of the above. d) 6. Consider an M/M/1 queue with an arrival rate of 4 customers per hour, an average service time of 12 minutes. What is the percentage of time an arriving customer does not have to wait? a) 33.33% b) 80.00% c) 66.66% d) An arriving customer always has to wait. e) None of the above e)
Background image of page 2
3 7. Bank XYZ is hiring, and they would like to determine the number of tellers they should hire. Each teller is paid $15 per hour. Bank XYZ has assessed a cost on customer waiting at $10 per customer in line per hour. (In other words, each customer standing in line at the bank and not being helped by a teller costs the bank $10 per hour.) How many tellers must the Bank hire to minimize their total hourly cost? Assume customers arrive according to a Poisson process at rate 20 per hour, and that each customer spends an exponentially distributed amount of time with a teller that has mean 8 minutes.
Background image of page 3

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

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/15/2009 for the course BUAD 14900 taught by Professor Hiroshiochiumi during the Fall '08 term at USC.

Page1 / 15

illustrative_exam1_solution - Illustrative Exam 1...

This preview shows document pages 1 - 4. Sign up to view the full document.

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