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business
operations management 6th
Operations Management An Integrated Approach 2nd Edition R. Dan Reid ,Nada R. Sanders - Solutions
Elyssa's Elegant Eveningwear (EEE) needs to ship finished goods from its manufacturing facility to its distribution ware- house. Annual demand for EEE is 2400 gowns. EEE can ship the gowns via regular parcel service (3 days transit time), premium parcel service (1 day transit time), or via public
Explain how two-bin systems work.
Explain the concept of perpetual review.
Explain the basic concept of ABC analysis.
Describe the type of products that require a single- period model.
Explain how safety stock affects the reorder point.
Explain what safety stock is for.
Explain how a company can justify smaller order quanti-
Describe how changes in the demand, ordering cost, or holding cost affect the EOQ. ties.
Describe techniques for determining order quantities other than the EOQ or EPQ.
Explain the assumptions of the EOQ model.
Describe what is included in shortage costs.
Describe what is included in ordering or setup costs.
Explain what is included in the annual holding cost.
Describe the relevant costs associated with inventory policies.
Compare the two techniques, inventory turnover and weeks of supply.
Explain the different methods for measuring customer service.
Describe how the objectives of inventory management can be measured.
Explain the objectives of inventory management at the lo- cal business.
After visiting a local business, explain the different func- tions of their inventory.
Visit a local business and identify the different types of inventory used.
Consider other alternatives to reduce the strain on the administrative assistants.
Suggest ways the faculty can change work habits to reduce the burden on the administrative assistants,
Suggest ways in which the administrative assistants' jobs can be changed to make better use of their time and be more supportive to the faculty.
Describe how Dr. Bay can use the data.
If direct labor is assessed at $18 per hour, what would the labor savings per Navigator III be if all the employees used the same method that Sam uses?
Based on Susan’s observations, determine how long it actually takes Sam to produce a Navigator III.
Your company has received an order for 20 units of a product. The labor cost to produce the item is $9.50 per hour. The setup cost for the item is $60 and material costs are $25 per unit. The item can be bought for $92. The learning rate is 80%. Overhead is assessed at a rate of 55% of unit labor
Students in an operations management class have been assigned 6 similar computer homework problems. Alexis needed 40 minutes to complete the first problem. Assuming an 80% learning curve, how much total time will Alexis need to complete the assignment?
You need to develop a labor time estimate for a customer order of 20 network installations. It is estimated that the first installation will require 60 hours of labor and a learning curve of 90% is expected. (a) How many labor hours are required for the 15" installation? (b) How many labor hours
Your 20 observations of Dr. Knowitall reveal the following information. Assume that the estimate is to be within 5% of the true proportion 95% of the time.(a) Calculate the sample size needed to estimate the proportion of time Dr. Knowitall spends away on emergencies. (b) Calculate the sample size
As a class project you have been asked to project the pro- portion of time a professor spends on various activities. You have decided to use the work sampling method. Your initial ob- servations are shown. Activity Observed Grading Administrative paperwork Preparing for class Teaching class Meeting
You are given the following information. Element (in minutes) Observations 1 2 3 4 5 Cycle 1 0.58 1.50 0.79 0.30 Cycle 2 0.61 0.75 0.35 Cycle 3 0.59 0.73 0.33 Cycle 4 0.54 0.72 0.35 Cycle 5 0.60 1.40 0.72 0.30 2.00 Cycle 6.0.57 0.71 0.32 Cycle 7 0.53 0.80 0.30 Cycle 8 0.59 0.78 0.28 Cycle 9 0.63
You have 25 observations of university policeman Sgt. Jack B. Nimble during his normal workday. The results are shown here. Assume that the standard time estimate is to be within 5% of the true mean 95% of the time. Number of Activity Observed Times Observed Doing paperwork 9 On the phone 3 3 4 2
The following information is provided to you for each of 5 elements performed in building the Aviator model, a basic universal remote control. Mean Performance Observed Time Rating Element (minutes) Factor Frequency 1 0.96 0.96 1.0 2 1.45 1.10 1.0 3 3.331 1.00 0.33 4 1.24 0.90 1.0 5 1.18 1.05 1.0
Frank's Fabricators has collected the following informa- tion to develop a standard time for producing their high- volume Navigator III, a universal remote control. All of the times are in minutes. Elements Observations 1 2 3 4 5 6 Cycle 1 1.10 3.00 0.92 1.23 1.46 1.80 Cycle 2 1.08 0.88 1.30 1.64
Jake's Jumbo Jacks has collected the following informa- tion to develop a standard time for building jumbo jacks. Element (in minutes) Observations 1 2 3 4 5 Cycle 1 2.18 1.25 1.70 2.74 1.57 Cycle 2 2.22 1.23 1,75 2.66 1.55 Cycle 3 2.20 1.29 1.72 2.60 1.57 Cycle 4 2.18 1.30 1.80 2.56 1.57 Cycle 5
Compare the two standards calculated in Problems 6 and8.What other factors should be considered in selecting the method for determining the allowance factor?
Based on the standard time calculated in Problem 8, how many units should an employee operating at 100% of standard complete during an 8-hour workday?
The Arkade Company is considering switching to a 15% allowance based on time worked. Calculate the new standard time for each work element and for the total job.
Based on the standard time calculated in Problem 6, how many units should an employee operating at 100% of standard complete during an 8-hour workday?
The Arkade Company has decided to use a 15% allowance factor based on job time. Calculate the standard time for each work element and for the total job.
Calculate the normal time for each of the work elements.
Using the information in Problem 3, calculate the sample size needed if the standard time estimate is to be within 5% of the true mean 99% of the time. Calculate the percentage in- crease in sample size for the higher precision.
Using the following information, determine the sample size needed if the standard time estimate is to be within 5% of the true mean 95% of the time. Standard Mean Work Deviation Observed Time Element (minutes) (minutes) 0.60 2.40 234556 0.20 1.50 1.10 3.85 0.85 2.55 0.40 1.60 0.50 2.50
Using the information in Problem 1, determine the sample size needed if the standard time estimate is to be within 5% of the true mean 99% of the time.
Given the following information, determine the sample size needed if the standard time estimate is to be within 5% of the true mean 97% of the time. Standard Mean Work Deviation Observed Time Element (minutes) (minutes) 1 0.20 1.10 234 0.10 0.80 0.15 0.90 4 0.10 1.00
Explain why it makes sense to use an output-based com- pensation system.
Explain why it makes sense to use time-based compensa- tion systems.
Explain the difference between time-based and output- based compensation plans.
Compare and contrast the four work measurement tech- niques.
Analyze a daily activity to see whether you can improve the process.
Create a process flowchart for an activity that you do daily-for example, getting ready for school each day.
Describe the alternative workplace approach.
Describe factors affecting the work environment that must be considered in work systems design.
Describe the advantages and disadvantages of using a high level of job specialization.
Describe cases in which machines are preferable to people.
Describe cases in which people are preferable to machines.
Explain what we mean by technical feasibility, economic feasibility, and behavioral feasibility.
Explain why it is hard to design jobs in a business setting.
Describe the objectives of job design.
Visit a local business and describe the jobs to be done, the workers needed for the jobs, and how the workers help achieve the objectives of the business.
Describe the major components of work system design.
Will purchasing an additional washer and dryer solve the problem? How will the cycle time change with an additional washer and dryer? Suggest a solution to the problem.
What is the cycle time of the current washing-drying-fold- ing process? What should the cycle time be in order to meet towel demand?
What is the reason Sawhill is regularly running out of towels?
Imagine an athletic facility such as Sawhill. What strategies would you suggest for creating an open environment?
Use trial and error to come up with a better layout that lowers the Id score. Explain the departments you thought needed to be in close proximity to one another.
Develop an Id score for the current layout. What problems can you identify with the current layout?
Use the data from Problem 19 to rebalance the line with a cycle time of 90 seconds. How does the number of workstations change? What happens to the output and the line’s efficiency?
Table 10-23 shows the tasks required to assemble an aluminum storm door and the length of time needed to complete — each task.(a) Calculate the cycle time needed to produce 60 doors in an 8-hour work day. (b) What is the minimum number of workstations that can be used on the line and still
A dress-making operation is being designed as an assembly line. Table 10-22 shows the tasks that need to be performed, their task times, and preceding tasks. If the goal is to produce 30 dresses per hour, answer the questions.a) Compute the cycle time.b) Which task is the bottleneck?c) What is the
Use the longest task time rule to balance the assembly line described in Table 10-21 as the line can produce 30 units per hour.(a) What is the cycle time? (b) What is the theoretical minimum number of stations? (c) Which work elements are assigned to which workstations? (d) What are the resulting
Kiko Teddy Bear is a manufacturer of stuffed teddy bears. Kiko would like to be able to produce 40 teddy bears per hour on its assembly line. Use the information provided in Table 10-20 to answer the following:(a) Draw a precedence diagram. (b) What is the cycle time? (c) What is the theoretical
The ABC Corporation is designing its new assembly line. The line will produce 50 units per hour. The tasks, their times, and their immediate predecessors are shown in Table 10-19: TABLE 10-19 Task Information for ABC Corporation Task Immediate Predecessor Task Time (sec) A None 55 B A 30 C A 22 D B
An assembly line must be designed to produce 40 containers per hour. The following data give the necessary information. TABLE 10-18 Task Information for Problem 14 Task Immediate Predecessor Task Time (sec) “A None 60 B A 2 G B 35 D A 5y5) E D 10 F E 50 H BiG 5 (a) Draw a precedence diagram.
An assembly line must be designed to produce 50 packages per hour. The following data give the necessary information. TABLE 10-17. Task Information for Problem 13 Task Immediate Predecessor Task Time (sec) A None /J5) B A 60 iE B 315) D B 45 E B 10 F CADAE 50 (a) Draw a precedence diagram. (b)
A manufacturing company is designing an assembly line to produce its main product. The line should be able to produce 60 units per hour. The following data give the necessary information. TABLE 10-16 Task Information for Problem 12 Task Immediate Predecessor Task Time (sec) A None 35 B A 50 G A 21
Use trial and error to find a better layout for MMS Associates. Which sales people will be your priority to keep together?
His alternative plan is shown in Figure 10-18. What is the ld score for this plan? How does it compare to the original plan considered in Problem 9? FIGURE 10-18 Alternative office locations for sales staff at MMS Associates A E D B F
Michael Marc, the President of MMS Associates, is con- sidering an alternative plan for the sales staff situation described in Problem
MMS Associates is a telecommunications service provider. The company is currently redesigning its main office to accommodate 6 newly hired sales people. Some of the sales people are expected to work in teams, so office assignments are very important. Table 10-15 presents the from—to matrix
David’s Sport Supplies is a store that sells sports equipment and gear for teenagers and young adults. David’s is in the process of assigning the location of storage areas in its warehouse (Figure 10-16) to minimize the number of trips made to retrieve needed items. Given here in Table 10-14
T-Shirts Unlimited is a retailer that sells every kind of t-shirt imaginable. The different types of t-shirts are stored in departments that all take up the same amount of space. Given the available warehouse space (Figure 10-15) and a from-toatrix showing the number of trips to and from each
Use trial and error to develop a better layout for Gator Of- fice Supplies. Which departments do you think need to be in close proximity to one another?
5. Gator Office Systems is comparing two layouts for the design of its office building. It has interviewed managers in order to develop the from-to matrix shown in Table 10-12. The two layouts considered are shown in Figure 10-14. Which layout do you think is better for Gator Office Systems, using
Compute the /d score and compare it to Mason’s current and proposed layouts in Problem
Use trial and error to find a better layout for Mason Machine Tools in Problem
Mason Machine Tools is reevaluating its facility layout. The current layout is shown in Figure 10-13 and the from—to ‘matrix is in Table 10-11. Mason has to leave department C in its current location because relocation costs are too high. It is considering exchanging departments B and D.
Compute the /d score and compare it to the /d scores computed for Fresh Foods’ current and proposed layouts. Which is best?
Use trial and error to find a better layout for Fresh Foods Grocery in Problem
Fresh Foods Grocery is considering redoing its facility lay- out. The from-to matrix showing daily customer trips between departments is shown in Table 10-10, and their current layout is shown in Figure 10-12. Fresh Foods is considering exchanging the locations of the dry groceries department (A)
Give an example of a poor layout. Find a better solution for that layout problem.
Define group technology. Why is it important?
Explain the concept of cycle time and how it affects out- put. Give an example.
Find examples of a product layout in local businesses. Draw a picture to show the workstations and the tasks per- formed.
Identify the steps in designing a product layout.
Find examples of a process layout in local businesses. Draw a picture of the locations of departments.
Identify the steps in designing a process layout.
Identify the four types of layouts and their characteristics.
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