Operations Management Review Questions

INTRODUCTION TO OPERATIONS MANAGEMENT commencement 2012-ASSIGNMENT 1 lay down 1 ID Name 2 ID head t sever every last(predicate)yer 1 15 Marks dog Richards, the production manager of Zychol Chemicals, is preparing his quarterly radical, which is to overwhelm a productiveness analysis for his section. unmatchable of the inputs is production data prepared by Sharon Walford, his operation analyst. The report, which she gave him this morning, showed the interest. 2011 2012 Production ( building blocks) 4,500 6,000 Raw solid utilize (barrel of petroleum by-products) 700 900 Labor arcminute 22,000 28,000 Capital hail applied to the de crashment ($) 375,000 620,000 tag in the altogether the his labor equal per hour has interchange magnitude from average of $13 per hour to an average of $14 per hour, in the beginning due to a move by management to become more(prenominal) agonistic with a new company that had well(p) opened a plant in the area. He also knew t hat his average address per barrel of raw material had increased from $320 to $360. He was concerned about the accounting system procedures that increased his capital cost from $375,000 to $620,000, precisely earlier discussions with his boss suggested that there was aught that could be done about the all(prenominal)ocation. Bob wondered if his productivity had increased at all.He called Sharon into the state of affairs and conveyed the above information to her and asked her to prepare this part of the report. Discussion inquiry 1- civilize the productivity part of the report for Mr Richards. He plausibly expects some analysis of productivity inputs for all factors, as well as a multifactor analysis for both long time with the change in productivity (up or down) and the measurement noted. 2- Assume additional information related to to the cost of production were available. The cost per unit for 2011 was $120 and for 2012 was $125. Considering the increase in the cost is there a change in multifactor productivity growth? resolve Q1 incertitude 2 15 Marks Forecasts based on average. stipulation the spare-time activity data (Stevenson page 96) pointedness Number of Complaints 1 60 2 65 3 55 4 58 5 64 Prepare a forecast using each of these approaches a. The appropriate naive approach. 2 mark b. A one-third period moving average. 3 marks c. A plodding average using weight of 0. (most recent), 0. 3 and 0. 2. 4 marks d. Exponential smoothing with a smoothing constant of 0. 4. 6 marks ascendant Q2 Question 3 15 Marks Using seasonal relatives, Apples Citrus payoff Farm ships boxed fruit anywhere in Middle East. Using the following information, forecast shipments for the first four months of beside year. Month seasonal Relatives Month Seasonal Relatives January 1. 2 July 0. 8 February 1. 3 fantastic 0. March 1. 3 September 0. 7 April 1. 1 October 1. 0 May 0. 8 November 1. 1 June 0. 7 December 1. 4 The monthly equation being used is Yt = 402 + 3t Where t = 0 correspond to January of twain years ago Yt = Number of boxes of fruits judge to ship in month t. Solution Q3Question 4 15 Marks Consider the following two techniques for forecasting F1 and F2. The actual and the two sees of forecast are as follows point Demand F1 F2 1 68 66 66 2 75 68 68 3 70 72 70 4 74 71 72 5 69 72 74 6 72 70 76 7 80 71 78 . Calculate the MAD, for each set of forecast. Given your results, which technique appears to be more accurate? Explain b. Calculate the MSE, for each set of forecast. Given your results, which technique appears to be more accurate? c. Calculate the MAPE, for each set of forecast. Given your results, which technique appears to be more accurate? Solution Q4 Question 5 10 Marks Rick annex, salesperson for reel Soldering Systems, Inc. (WSSI), has provided you with a proposal for up(p) the temperature control on your present forge.The machine uses a hot-air knife to cleanly study excess solder from pr inted circuit boards this is a great concept, but the hot-air temperature control lacks dependability. agree to Wing, engineers at WSSI bewilder improved the reliability of the critical temperature controls. The new system solace has the four sensitive integrated circuits irresponsible the temperature, but the new machine has a backup for each. The four integrated circuits put one across reliabilities of 0. 90, 0. 92, 0. 94, and 0. 96. The four backup circuits all have a reliability of 0. 90. ) What is the reliability of the new temperature controller? b) If you pay a premium, Wing says he can improve all four of the backup units to 0. 93. What is the reliability of this election? Solution Q5 Question 6 15 Marks A weather satellite has an expected carriage of 16 years from the time it is mall into earths orbit. Determine its hazard of spoilure after each of the following lengths of service. (Assume Exponential distribution is appropriate. ) 2. 5 marks each a, b, c, and d a. much than 9 years b. Less than 12 years c. More than 9 years but slight than 12 years . At least(prenominal) 21 years Solution Q6 Question 7 15 Marks An office manager has authorized a report from a advisor that includes a section on equipment replacement. The report indicates the scanners have a service aliveness time that is Normally distributed with a pissed of 41 months and standard deviation of 4 months. On the basis of this information, determine the percent of scanners can be expected to fail in the following time periods. a. forwards 38 months of service b. Between 40 and 45 months of service c. Within 2 months of the mean life Solution Q7