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?

A. 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)

B. 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)

C. 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.

D. 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.

a) What is the desired Cycle time in seconds?

b) What is the theoretical minimum number of stations?

c) Use trial and error to work out a solution in the table below. Your efficiency should be at least 90%.

d) Calculate the efficiency of your solution.

E. 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.

Calculate the weighted score for each alternative. Which location would you recommend?

F. Complete the following MPS Record (15 points)

G. 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.

H. 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?

b) Use the information in Table above, what is the process bottleneck?

c) Use the information in Table above, what is the 8-hour capacity for the process?

d) Use the information in Table above, where would you expect customer wait times to occur?

Transcribed Image Text:

Sample 1 2 3 4 5 Observations 1 73.5 71.3 70.0 71.1 70.8 2 3 4 5 70.8 72.2 73.6 71.0 71.0 73.1 72.7 72.2 72.6 71.9 72.4 73.3 70.6 70.3 74.2 73.6 70.7 70.7 73.5 71.1 Week number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Complaints 5 2 7 1 3 2 8 1 3 5 4 6 3 1 نیا 1. Office Supplies (O)--- 2. Sporting Goods (S) 3. Hardware (H) 4. Toys (T) 5. Automotive (A) 6. Electronics (E) Closeness Factors (Trips per hour) 1/0 2/S 3/H 4/T 5/A 6/E 40 100 100 80 50 20 10 60 80 70 1 --- 100 50 70 90 60 1 1 Work Element A B с D E F G Time (Sec.) Immediate 40 45 55 55 65 40 25 Predecessor(s) A B B C,D D.E Lot Size Lead Time 130 1 45 Quantity on Hand Forecast Customer Orders (booked) Projected On-Hand Inventory MPS Quantity MPS start Available to Promise Inventory 1 25 30 2 3 4 25 25 25 20 5 8 نیا 89 5 6 50 7 50 50 2 8 9 10 50 40 20 Component On-hand A B с 5 75 10 Component D E F (7) On-hand 15 3 20 نیا B(2) A(2) D(2) END ITEM E(1) F(2) C(2) B(3) Table for problem 8 A B C D E Sample 1 2 3 4 5 Observations 1 73.5 71.3 70.0 71.1 70.8 2 3 4 5 70.8 72.2 73.6 71.0 71.0 73.1 72.7 72.2 72.6 71.9 72.4 73.3 70.6 70.3 74.2 73.6 70.7 70.7 73.5 71.1 Week number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Complaints 5 2 7 1 3 2 8 1 3 5 4 6 3 1 نیا 1. Office Supplies (O)--- 2. Sporting Goods (S) 3. Hardware (H) 4. Toys (T) 5. Automotive (A) 6. Electronics (E) Closeness Factors (Trips per hour) 1/0 2/S 3/H 4/T 5/A 6/E 40 100 100 80 50 20 10 60 80 70 1 --- 100 50 70 90 60 1 1 Work Element A B с D E F G Time (Sec.) Immediate 40 45 55 55 65 40 25 Predecessor(s) A B B C,D D.E Lot Size Lead Time 130 1 45 Quantity on Hand Forecast Customer Orders (booked) Projected On-Hand Inventory MPS Quantity MPS start Available to Promise Inventory 1 25 30 2 3 4 25 25 25 20 5 8 نیا 89 5 6 50 7 50 50 2 8 9 10 50 40 20 Component On-hand A B с 5 75 10 Component D E F (7) On-hand 15 3 20 نیا B(2) A(2) D(2) END ITEM E(1) F(2) C(2) B(3) Table for problem 8 A B C D E

Answer rating: 100% (QA)

1 The business function responsible for planning coordinating and controlling the resources needed to produce a companys goods and services This is true whether the company is large or small provides ... View the full answer