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operations management
Questions and Answers of
Operations Management
You have a system composed of a serial connection of four components with the following reliabilities:What is the reliability of the system? COMPONENT 1 2 3 4 RELIABILITY 0.90 0.95 0.80 0.85
What are three ways in which Lean and quality are related?
Given the probabilities that follow for Ronny Richardson’s print shop, find the expected breakdown cost.The cost per breakdown is $10. NUMBER OF BREAKDOWNS DAILY FREQUENCY 0 0.3 1 0.2 2 0.2 3 0.3
A distributor of lighting system in Egypt uses the EOQ model to manage its inventory from LED light bulbs. The annual demand for LED light bulbs is 200,000 units, holding cost is LE 12 per unit per
Ferdows Electronics, Inc. (FEI), produces short runs of custom microwave radios for railroads and other industrial clients. You have been asked to reduce inventory by introducing a kanban system.
Flores Manufacturing, Inc., is moving to kanbans to support its electronic-board assembly lines. Determine the size of the kanban for subassemblies and the number of kanbans needed.Setup cost =
A large hypermarket based in Kuwait is considering different plans for expansion. The management has identified three possible alternatives: build two new stores, build one new store, or do nothing.
The Adam Smith Trading Company wants to increase its markets and conduct business in more countries. It has done a pre-study about costs for opening new offices and approximate yearly profits (all
A news vendor wants to decide on the number of magazines to order for the next day. Based on his experience, he believes that demand for the magazine would range from 400–900 based on the following
Describe how and when making a decision tree will make you do the right decisions.
Given the following conditional value table, determine the appropriate decision assuming that each state of nature has an equal likelihood of occurring: ALTERNATIVES Large plant Small
The organizing company of the famous rapper Sean Paul’s concert in Dubai has decided to print shirts to be sold in the event. The company decision is to either print 5,000, 10,000, or 20,000
Describe a case where a decision tree will not be the optimal model for decisions.
The following payoff table provides profits based on various possible decision alternatives and various levels of demand:The probability of low demand is 0.4, whereas the probability of medium and
Why is a decision tree appropriate for making decisions under risk?
Ahmed Saif is the manager of a large agriculture firm that owns 100,000 acres in the new valley project of Toshka in the Western desert of Egypt. He now needs to decide on which one of three crops to
Al-Andalus retail store in Saudi Arabia wants to decide on whether to build a large or a small store in the city of Dammam. The expected net present value of the return per month of the decision will
A car manufacturer supplies brake pads from two main suppliers. Historical quality information indicates that for Supplier 1, there is a 65% probability that a given lot would contain 3% defects, 25%
Abdulla wants to decide on the best route to take for work from two possible routes: A and B. The time taken to work on each route depends on the traffic. If Abdulla takes route A, it will take him
A large investment firm wants to decide on how to invest one million dollars. The board is considering three options: invest in stocks, invest in T-Bills, or do nothing. There are two possibilities
The pharmaceutical company Neuronome is in late clinical phase of a new cancer treatment. However, their competitor Immunoneuron is also in the late clinical phase of a pharmaceutical for the same
A construction company wants to decide on whether to bid for a new project or not. If the company decides to bid, there is a KWD 10,000 cost associated with preparing the preliminary proposal. The
The Machine Shop is a retailer of tools for carpenters. Their top selling product is a revolutionary saw, which sells for €999. However, they are short on cash and try to hold the storage as short
In the TV show and game “Who Wants to be a Millionaire?” the participants get four choices for each question and the questions get tougher and tougher the longer a participant stays in the game.
Bakery Products is considering the introduction of a new line of pastries. In order to produce the new line, the bakery is considering either a major or a minor renovation of its current plant. Bill
Formulate your own optimization (maximization) problem with three variables, one objective, and three constraints.
A calculated optimal solution to a LP max problem is not always chosen. Explain why.
How does a minimizing problem differ from a maximizing problem?
When introducing an additional constraint, what will happen to the solution of the optimization problem?
An online retailer wants to optimize its marketing portfolio budget to maximize its return on investment (ROI). The retailer has decided to allocate a AED 1,000,000 budget across three different
Why is it not advisable to round optimal solutions to nearest integer?
Walter Wallace is trying to determine how many units each of two commercial multiline telephones to produce each day. One of these is the standard model; the other one is the deluxe model. The profit
Mamlouk Design is an Egyptian manufacturer of handmade silk rugs. The company manufactures rugs in two different sizes:1.5 x 2.5 meters and 2 x 3 meters. The manufacturing process depends mainly on
A tailor sews dresses and suits. For a suit the tailor uses 3 m2 of wool and 1 m2 of cotton. For a dress the tailor uses 2 m2 of wool and 2 m2 of cotton. The tailor has 80 m2 of cotton and 120 m2 of
This is the slack time of year at JES, Inc. The firm would actually like to shut down the plant, but if it laid off its core employees, they would probably go to work for a competitor. JES could keep
A feed processor in Delta Egypt must store various amounts of three different commodities in five different silos. The loading cost per ton in E£, the amount to be stored in tons, and the
Fixawy is a new mobile platform operative in Egypt to search for home service craftsmen. In order to expand its network, the company has decided to develop an aggressive social media marketing
The intensive care unit (ICU) at a certain hospital operates 24 hours a day. Doctors report for duty at 6 a.m., 12 p.m., 6 p.m., or 12 a.m., and the following table below shows the minimum number of
The donkey driver Donkey King is using a donkey to carry goods from Harbor City to a village up in the mountains. The people living in the village are willing to buy gold, silk, salt, and sponge.
Randa’s Bakery, Egypt, is considering adding a fourth plant to its three existing facilities in 6th of October, 10th of Ramadan, and Obour. Both Giza and Mokatam are being considered. Evaluating
An equipment manufacturer wants to decide on the location of a new facility. Currently, the company has a plant in Egypt and a plant in Turkey. The company is deciding where to build a new
A commercial bakery in Dubai has three production lines that supply baked goods to four stores. The cost of shipment from each production line to each store (in AED per 1,000 pieces) is shown in the
The following table presents cost, capacity, and demand data for a transportation problem in Jinfeng Yue’s furniture company. Set up the appropriate transportation table and find the initial
A juice manufacturer produces juice at plants in Cairo, Alexandria, and Aswan. These are sent to regional distributors in Giza, Tanta, and Sohag. The shipping costs vary, and the company would like
There is only one copying machine in the student lounge of the business school. Students arrive at the rate of λ = 40 per hour (according to a Poisson distribution). Copying takes an average of 40
Vacation Inns, a chain of hotels operating in the southeastern region of the U.S., uses a toll-free telephone number to take reservations for all of its hotels. An average of 12 calls are received
Customers arrive at a local 7–11 store at the rate of λ = 40 per hour (and follow a Poisson process). The only employee in the store can check them out at a rate of μ = 60 per hour (following an
Due to a recent increase in business, a paralegal must now process an average of 20 legal briefs per day (assume a Poisson distribution). It takes him approximately 20 minutes to prepare each brief
At the start of football season, the ticket office gets very busy the day before the first game. Customers arrive at the rate of four every 10 minutes, and the average time to transact business is 2
An aircraft engine manufacturing company spent 68,000 man-hours to produce the first unit of a turbo engine; 40,000 man-hours were spent on the 27th production. Calculate the learning curve rate
If the fourth oil change and lube job at Trendo-Lube took 18 minutes and the second took 20 minutes, estimate how longa) The first job took.b) The third job took.c) The eighth job will take.d) The
Cleaning a toxic landfill took EPA contractor, Henry Garcia, 300 labor-days. If Garcia follows an 85% learning rate, how long will the firm take, in total, to clean the next five (that is, landfills
The time between incoming calls to a help desk can be seen as a Poisson distributed random variable with an average of three minutes, and the duration can be seen as a discrete random variable. The
Professor Hayes took 20 minutes to grade the first exam. He estimates that it will take him two hours to grade all 10 exams. What learning factor is he assuming?
It takes 80,000 hours to produce the first jet engine at T.R.’s aerospace division and the learning factor is 90%. Help production manager Gopal Easwaran determine how long it takes to produce the
Every home football game for the past 8 years at Southwestern University has been sold out. The revenues from ticket sales are significant, but the sale of food, beverages, and souvenirs has
Adventure Rafting runs rafts on the Colorado River. It has eight rafts in its inventory. The demand for rafts during the busy months of June and July has been either 4, 5, 6, 7 or 8, with
How can an operations manager successfully use a simulation model?
What should an operations manager keep in mind when looking at the results from a simulation model?
The number of cars arriving at Mark Coffin’s self service gasoline station during the last 50 hours of operation are as follows:The following random numbers have been generated: 44, 30, 26, 09, 49,
Why is it a good reason using a cumulative distribution as an input into a Monte Carlo simulation model?
Woodworth Property Management is responsible for the maintenance, rental, and day-to-day operation of a large apartment complex in El Paso. Bruce Woodworth is especially concerned about the cost
A nail salon is deciding if appointing an additional manicurist will be financially feasible. Today, the nail salon has three manicurists, only one of whom is by appointment and the other two for
How many times do you need to run a Monte Carlo simulation to achieve an appropriate model? Why does it differ from model to model?
Describe the three categories of business analytics.
Describe the three major issues for data management and clean data.
What are some ways to use Excel to clean data?
Describe the three paths of data mining.
Thompson Industries’ supply chain manager, Xun Xu, wishes to identify suppliers with the largest and smallest purchase levels, so he knows where to focus his purchasing resources. He suggests that
Thompson Industries’ supply chain manager, Xun Xu, wishes to understand the makeup of his supply base better. He suggests that you, using the data in Figure G.5, use Excel to create a PivotTable
Describe the purpose of a heat map.
Thompson Industries’ CEO, Gihan Edirisinghe, wishes to identify the top-performing suppliers to present with a performance award. He suggests that you, using the data in Figure G.5, use Excel to
Thompson Industries’ supply chain manager, Xun Xu, wishes to better understand the quality and on-time performance of his supply base. He suggests that you, using the data in Figure G.5, use Excel
Operations manager Phil Witt wishes to apply the Blue – White – Red color scale using Excel’s Conditional Formatting to the following data:a) Which plant will be colored the darkest shade of
A small electronic manufacturing company that makes communication devices has determined its costs as follows (all value data are expressed in millions euro):a) Calculate and compare all
What are some career opportunities in the operations management discipline?
As an operations management student, you have been hired by a local restaurant to perform a factor-rating analysis to help the restaurant choose an outsourcing provider. You have identified three
“The reasons for failure in productivity are cost reduction programs, which produce narrowness of vision. We must first let go of old-fashioned productivity as a goal: instead, we must set a new
You are about to establish your own business; your strategy is to focus on your core business and outsource the customer service to an external service provider to handle the customers’ requirement
Discuss the overlap amongst operations, marketing, and finance—the three functions basic to all organizations—for small and medium enterprises.
An air conditioner factory makes three different types of air conditioners: the ceiling type, the cassette type, and the wall-mounted type. Weekly sales of each type are 2, 4, and 6 units at a price
What is competitive advantage and what is the theory of comparative advantage?
What are the implications for operations management with respect to the following organizational strategies: (1) Low price, (2) Good quality, (3) Response, (4) Innovation, (5) Variety, and (6)
When is the application of a multi-domestic strategy most appropriate? What kind of industries can this be applied to?
You are the project manager for a project in which you are going to organize a conference. Develop a work breakdown structure (WBS) in the form of a hierarchical framework, similar to the one in
Can the operations function on its own provide competitive advantage?
Potamia Construction Co. (PCC) is developing plans to erect a new hospital building. Potamia Construction Co. has established the project activities and their immediate predecessor activities
Explain, citing appropriate examples, how flexibility saves time and stimulates response.
Using the project information listed in the table below:a) Draw the AON network for the construction activity.b) Draw the AOA for the construction activity. ACTIVITY A B C
Read about Zara, the Spanish fashion retail company, and explain what is the best descriptive of Zara’s strategy approach. Explain some key operations management decisions that help Zara implement
The table below shows the activities, immediate predecessors, and activity durations of a project. Draw the AON project network. How long would it take to complete this project? What is the length of
A project has the following activities, precedence relationships, and activity durations. Draw the AOA project network. How long would it take to complete this project? What is the length of the
Draw the AON project network using the following information:How long would it take to complete this project? Which activities are included on the critical path?
What is a project and why is it important is to understand the project environment?
The following represent activities in Marc Massoud’s Construction Company project.a) Draw the network to represent this situation.b) Which activities are on the critical path?c) What is the length
Draw the AON project network using the following information:a) Draw an AON diagram of the project, including activity durations.b) Define the critical path, listing all critical activities in
What are the ethical dilemmas that project managers are faced with when dealing with projects?
Given the project diagram that follows, see graph (a) and the details of the accompanying table. How can you reduce the completion time of the project by 4 weeks in the most economical way?
While numerous trade-offs may be required during the life cycle of a project, the trade-offs between cost, time, and performance are considered essential. Discuss.
Janice Eliasson must complete the activities in the following table to finish her consulting project.a) Draw the appropriate PERT diagram.b) Find the critical path and project completion time.c) Find
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