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QSO600 Final exam




Question;Final Exam;Operations Management;QSO 600 Operations Management;The final exam;consists of five essay and eight problem questions. Answer all the questions.;Essay Questions;There is no set;length for answers, students may be as verbose or brief as they feel necessary;to cover the question. Use this same exam document for your answers, placing;them below each question.;Problem Questions;Make sure to show;all your work to get full credit. The instructor needs to know the formulas and;calculations you used to get to your final answer. You can do part of the exam in Excel and;Paste your Excel work into this document.;File Convention;File name for the;exam attachment to be;studentlastname-finalexam;(Be sure there are no spaces);Be sure to put;your name on the exam paper.;Note: You may use the text;and any other materials. You are NOT to work with anyone else including other students;in completing the exam nor discuss it with them.;Essay Questions;1. What is operations management? Why is it important? Is a good;knowledge of operations management more important in service or manufacturing;industries? Explain your answer.;2. Discuss the use of PERT/CPM techniques for managing projects.;Describe what PERT/CPM does. Discuss advantages and disadvantages of using it.;What other techniques might you choose to manage your project?;3. What are economies of scale in a manufacturing plant? Do they;continue forever? What are diseconomies of scale? How might you decide the;optimal size of a plant?;4. What, in your opinion are the 3 most important issues in supply;chain management. Discuss why you think these are the key issues.;5. Discuss why (or if) inventories are necessary. What are the benefits;of inventories? What are the disadvantages of holding inventories?;Problem;Questions;1. Thermostats are subjected to rigorous testing before they are;shipped to air conditioning technicians around the world. Results from the last;five samples are shown in the table. Draw and R Chart and an x-bar chart. Based on the charts, is the process under;control? (20 Points);Observations;Sample;1;2;3;4;5;1;73.5;70.8;72.2;73.6;71.0;2;71.3;71.0;73.1;72.7;72.2;3;70.0;72.6;71.9;72.4;73.3;4;71.1;70.6;70.3;74.2;73.6;5;70.8;70.7;70.7;73.5;71.1;Answer 1;2. A professor records the number of students who complain;each week throughout the semester. If the class size is forty students, what;are 3-sigma control limits for this class? Construct a control p-chart and;interpret the data. Is the process in;control? (20 points);Week number;Complaints;1;5;2;2;3;7;4;1;5;3;6;2;7;8;8;1;9;3;10;5;11;4;12;6;13;3;14;1;15;4;Answer 2;3. A department store chain is designing a layout for a new store. The;store manager wants to provide as much convenience as possible for her;customers. Based on historical data, the number of trips between departments;per hour is given in the following closeness matrix. A block plan showing a;preliminary layout is also shown.;Closeness Factors (Trips per hour);1/O 2/S 3/H 4/T 5/A 6/E;1. Office Supplies (O) --- 40 100 50 20 10;2. Sporting Goods (S) --- 100 80 60 80;3. Hardware (H) --- 70 100 50;4. Toys (T) --- 70 90;5. Automotive (A) --- 60;6. Electronics (E) ---;OFFICE SUPPLIES;SPORTING;GOODS;3. HARDWARE;4. TOYS;5.;AUTOMOTIVE;6. ELECTRONICS;Customer;travel between departments is restricted to the aisles shown in the block plan;as dotted lines.;CALCULATIONS;TABLE;Dept. Pair;Closeness Factor (w);Original Distance (dO);w?;dO;Revision #1 Distance (d1);w?;d1;1 ? 2;1 ? 3;1 ? 4;1 ? 5;1 ? 6;2 ? 3;2 ? 4;2 ? 5;2 ? 6;3 ? 4;3 ? 5;3 ? 6;4 ? 5;4 ? 6;5 ? 6;TOTAL;Complete the calculations and fill in the table;above. Based on the table above answer;the following questions.;a) What is the total expected weighted-distance;score between Office Supplies and Hardware? (4 points);b) What is the total weighted-distance score;between Hardware and Toys? (4 points);c) What is the total weighted-distance score for;the entire store? (4 points);d) A suggestion has been made to switch Hardware;and Automotive. What would the total weighted-distance score for the entire;store if these two departments were switched? (4 points);e) Based on your calculations, would you;recommend that Hardware and Automotive be switched? (4 points);Answer 3;4. Balance the assembly line for the tasks contained in the table. The;desired output is 240 units per day. Available production time per day is 480;minutes.;Work Element;Time (Sec.);Immediate Predecessor(s);A;40;---;B;45;---;C;55;A;D;55;B;E;65;B;F;40;C,D;G;25;D,E;a);What is the desired Cycle time in seconds? (4 points);b) What is the theoretical minimum;number of stations? (4 points);c);Use trial and error to work out a solution in the table below. Your efficiency should be at least 90%. (10;Points);Station;Candidates;Choice;Work-Element;Time (Sec);Cumulative Time (Sec);Idle Time;d);Calculate the efficiency of your solution. (2 points);Answer 4;5. A manufacturer?s research;and development center must expand by building a new facility. The search has;been narrowed to five locations, all of which are acceptable to management. The;assessment of these sites is being made on the basis of the five subjective;location factors that follow. Management has agreed to use a five-point scale;(Excellent = 5, and Poor = 1) to quantify and compare their subjective opinions;about the relative goodness of the sites. The weight reflects the importance of;each factor in the decision.;Locations;Factor;Weight;A;B;C;D;E;Labor climate;0.30;4;2;1;4;2;Proximity to markets;0.30;5;3;3;4;4;Quality of life;0.15;1;3;2;1;5;Proximity to suppliers;0.15;2;5;3;4;3;Taxes;0.10;4;4;4;1;3;Calculate the weighted score for each alternative. Which location;would you recommend?(15 points);Answer 5;6. Complete the following MPS Record (15 points);Lot Size;130;Lead Time;1;Quantity on Hand;45;1;2;3;4;5;6;7;8;9;10;Forecast;25;25;25;25;50;50;50;50;40;20;Customer Orders (booked);30;20;5;8;2;Projected On-Hand Inventory;MPS Quantity;MPS start;Available to Promise Inventory;Answer 6;7. Use the bill of materials and inventory records to determine the;quantity of purchased items necessary to assemble 20 end items if the;manufacturer uses lot-for-lot ordering. There are no end items currently on;hand, and none of the components have any scheduled receipts. (20 points);Component;On-hand;Component;On-hand;A;5;D;15;B;75;E;3;C;10;F;20;Answer 7;8.;Use the table below to answer;the following questions.;a);Use the information in the Table above, what is the throughput time for;the process, assuming that the Call Center is always busy and has customers;waiting to be processed? (5 points);b);Use the information in Table above, what is the process bottleneck? (5;points);c) Use the information in Table above, what;is the 8-hour capacity for the process? (5 points);d) Use the information in Table above, where;would you expect customer wait times to occur? (5 points);Answer 8


Paper#62065 | Written in 18-Jul-2015

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