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business
operations management

Questions and Answers of Operations Management

Peggy’s Car Wash can service an average of 12 cars per hour. Given an average arrival rate of 8 customers per hour, use the Poisson distribution to calculate the probability that the car wash can
Using the information in Problem 5, what is the probability that less than 5 customers will arrive in an hour?Data from 5What is the probability that exactly 10 customers will arrive in an hour when
What is the probability that exactly 10 customers will arrive in an hour when the mean arrival rate is 20 customers per hour and interarrival times are exponentially distributed?
Given the following information, determine the optimal overbooking policy. The restaurant€™s capacity is 24 tables. The historic number of no-shows for a typical day along with the
Determine a consecutive days off schedule using the following daily worker requirement, and use part-time workers if needed. Th Su 9 6 Requirement 12 13 15 10 17 Answer: Th Su Requirement 12 13 15 10
Do you think the “office of the future” has any validity?
Using the work flow visualized video, describe the work flow you use when doing your homework assignments.
Explain why customers wait in line less time, when a snake line is used, instead of multiple queues.
A manufacturing assembly line has a demand for a specific part of 1200 parts per eight-hour day. It wants to design a lean system using containers. It takes about four hours to round-trip a container
A lean system uses 22 containers, each of which can hold 15 parts. The lead time required to round trip one container through the system is normally 4 hours. The usual safety stock level is 10
A lean system has the following characteristics:Demand rate = 20 parts per hour; safety stock required = 5 percent; number of containers used = 14; lead time to replenish an order = 6 hours.a)
Boehm Compressors uses a lean production assembly line to make its compressors. In one assembly area, the demand is 100 parts per eight-hour day. It uses a container that holds eight parts. It
A listing of deliveries to be completed for the day are shown below. Assuming that the customers are ranked in proximity to one another (i.e., customer 4 is closer to customer 3 than customer 5 is),
Nikolai€™s Furniture Delivery business delivers to a set of customers as demand dictates. The current list of deliveries for the day is shown below. Assuming that the customers are ranked
Use the Cluster-first-route-second heuristic to determine acceptable total mileage delivery routes for two trucks (6 ton and 10 ton capacities) and the following network of customers with their
Using the following information and assuming that all of the automobiles arrived at the same time, use a Gantt chart and the critical ratio (CR) rule to prioritize jobs for processing. Determine the
Using the job information in Problem 3, Construct a Gantt chart using the minimum slack per operation (MINSOP) rule to determine the job priority ranking at each machine as the jobs progress through
Using the job information in Problem 3, Construct a Gantt chart using the critical ratio (CR) rule to determine the job priority ranking. Assume all jobs arrived simultaneously. Determine the
General Motors has a takt time of 8 minutes per unit—explain what this means? If the GM plant operated 24/7, how many units would be produced in one year?
How fast is the CNC milling machine for most of the tools featured in the video? How many different tools were featured?
During which years did Ford make their Model T? How many did they make?
Use the tasks shown and their precedence relationships to create the flow diagram. Determine the takt time and the minimum number of workstations, assuming and 8-hour workday and a required output of
Assume that all of the jobs below arrived at the same time. Use a Gantt chart and the earliest due date (EDD) rule to prioritize the jobs. Determine the makespan , average flowtime , average queue
Using the information from Problem 1, balance the line and determine the efficiency, the total labor time per day, total work time per day, and the total idle time per day.Data from 1 Time Task Task
Using the information from Problem 1, and assuming that all of the automobiles arrived at the same time, use a Gantt chart and the shortest-process-time (SPT) rule to prioritize the jobs. Determine
Also using the information from Problem 1, calculate minimum takt time and the corresponding output per day. What is the efficiency, total labor time, total work time, and total idle time per day?
If the company runs two shifts and operates 16 hours per day, determine the takt time in seconds per unit if the required output is 4000 units per day.
The Grebski Auto Repair Shop uses a shop floor control system based on forward scheduling to determine auto completion dates for their customers, and to determine when to release a car to the shop
For the following parts, determine part families and designate manufacturing cells for the part families. How many machines are required for your layout? Lathe Drill Mill Planer Sander Grinder Buffer
For the office layout shown in problem 13, assume a vertical move is 40 feet and horizontal move is 60 feet between adjacent departments. No diagonal movements are allowed. Using the daily trip
The Mary Kay Bakery has decided to arrange their processes such that an assembly operation can be used to increase their baked goods output. The processing activities are shown below, with the arrows
Determine the closeness desirability for the office layout and the desirability matrix shown below. The desirability scale is: -3 = undesirable, 0 = unimportant, 1 = slightly important, 2 =
Using the information in Problem 5, determine the minimum takt time and the corresponding output per day. What is the new efficiency and the new work time and idle time per day?
Given a total task time of 48 minutes, a desired output of 80 units per day and 2-eight hour shifts per day, what is the takt time in minutes per unit? What is the minimum number of workcenters ? If
For the office layout shown below, determine the closeness desirability rating using the closeness desirability matrix below. Treat the hallway as if it doesn€™t exist (i.e., the Production
Using the following assembly line information, construct a flow diagram using arrows to indicate sequence and precedence, calculate the takt time, calculate the minimum number of workcenters ,
For the information given in problem 8, what would be the minimum takt time, if the firm put one worker at each machine (i.e., used 6 workcenters )? What would be the corresponding output per day?
The Iarussi Real Estate Agency has decided to analyze the flow of employees in their office to see if a more effective layout can be designed to reduce total daily walking distance. They have five
Determine the total movement cost per day, for the given process-focused facility, and then find a better layout. Each vertical or horizontal move between adjacent departments is $1, while a
The manager at Tram€™s Candy Shop wants to determine a consecutive days off schedule for its workforce. Use the following daily worker requirement, and use part-time workers if needed. м
Given the following information, determine the optimal overbooking policy for a beauty salon. The salon€™s capacity is 8 patrons. The historic number of no-shows for a typical day along
Why is information considered an intellectual asset?
Define the three key informational flows in most organizations.
Define information velocity and describe its importance to, and impact on the firm.
Define information volatility and describe its importance to, and impact on the firm.
What is information flow mapping used for, and what role do information audits play in flow mapping?
What did Lennox gain by integrating their WMS, TMS, and labor management systems?
Determine the minimum number of days to make Part A, starting with no current inventories. Part Leadtime (days) D 3 2. 3.
Using the product structure diagram and the other information shown below, complete the part records for each of the six items. Note that Part D appears in two places, but must be combined into one
Using the information in problem 11, determine the minimum lead time to make Parts A, B, and C, assuming no current inventories. If 100 Part A’s are required, how many of each of the other parts
Try creating a Gantt chart of the park maintenance project using Excel.
Do you think a Six Sigma level of 4 is good? Explain.
Do you think Six Sigma training is necessary? Explain.
Does Jack Welch think Six Sigma will increase profits? Why/why not?
According to the video, will the use of Deming’s 14 points reduce costs?
What did Philip Crosby think quality management was all about?
Joseph Juran refers to “Big Q” in his interview—what was he referring to?
What are some of the training exercises discussed in the Six Sigma training video?
In the crash course on fishbone diagrams, how do they recommend picking something to fix?
Stan Eakins, owner of Eakins Boat Rentals, wants to start analyzing his company’s quality. For each boat rental, there are four types of customer complaints: 1) boat not operating properly, 2)
If a product has 162 parts, the company has produced 10,000 units, and so far they have had 1100 customer complaints about quality, what is their probable DPMO? What is their Six Sigma operating
A company currently has produced 1,425,000 units, with a total defect level of 4,280. Each unit has a potential of 294 defects. a. What is his company’s DPMO?b. What is their Six Sigma
What are the time series forecasts discussed in this chapter? Explain when you would use each one.
Describe the various qualitative forecasting techniques.
What is demand management?
Using the information in Problem 5, how much longer would the company have to hold onto Customer B, in order for the two customers to have the same lifetime values?Data from 5 Avg. Annual Sales Avg.
Using the information in Problem 5, what would the average profit margins have to be, to have both customer lifetime values equal $4000?Data from 5 Avg. Annual Sales Avg. Profit Margin Expected
Using the information below, rank the two customers in terms of customer lifetime value. Use a discount rate of 8 percent and treat the average sales figures as annuities. Avg. Profit Margin
Tire manufacturer Stonebridge sells tires to retail firm A. The average annual sales to firm A is $55,000. Their average profit margin is 15%. The expected lifetime of firm A is 10 years. Using a
Using the customer information in problem 1, recalculate the lifetime values using average profit margins of 9%, 11%, and 15% respectively, and a discount rate of 4 percent. Answer part b. again.
Using the customer information in problem 1, recalculate the lifetime values using a discount rate of 10 percent. Answer part b. again. Has anything changedData from 1 Expected Lifetime Avg. Profit
Sally€™s Mountaineering Supply sells hiking and climbing equipment to sporting goods and specialty hiking retailers. They recently began ranking their customers based on their expected
What are some of the notable items in life of a call center agent?
Do you agree with the list of the top customer service providers? Why or why not?
What does customer loyalty mean, and what makes customers loyal?
Provide some examples of customer service performance measures your school could use.
When would you recommend performing a pilot customer service project?
A manufacturing company’s effective capacity is 1 unit every 1.5 minutes. The actual output for August was 6000 units and the actual output for September was 6250 units. If the company was open
Your firm is experiencing high demand, some of which cannot be satisfied with current capacity. What capacity alternatives are available to meet demand?
If you wanted to improve the process of enrolling in and completing this class, what performance measures would you monitor?
Discuss why managers should want to monitor process performance. Yes No Repeats class
Calculate Sally’s capacity utilization for August and September.
Why is good forecasting so difficult? Is it an art or a science?
Why do companies perform forecasting? What are the effects of a poor forecast?
How would logistics plans be impacted by demand forecasts?
Describe some demand management activities, using examples.
Explain the role of demand management in forecasting.
What are contingent workers?
What are the three production planning strategies and when would you use each one?
What is aggregate planning? Do all firms practice some form of it?
What is collaborative planning, forecasting, and replenishment? How does it differ from other forecasting methods?
What is forecast error? What are the costs of forecast error?
What was Air India’s contingency plan, in case of a worker strike?
What does executive Paul Pease say about forecasting and accuracy?
Describe the impact the Tohoku earthquake probably had on manufacturers in Tokyo.
What is the secret of business forecasting? Does it make any sense?
What were some things Lowe’s did to improve their demand forecasts?
Why do you think more and more firms these days are using contingent workers?
Describe several manufacturers and service companies that would use each of the three production planning strategies, and how they would use them.
Could a business successfully exist without doing aggregate planning? Explain.

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