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operations management
Questions and Answers of
Operations Management
Under what conditions would you recommend a small manufacturer of consumer electrical goods to acquire additive manufacturing (AM) capabilities for producing some of the components needed for the
An automobile service is having difficulty providing oil changes in the 29 minutes or less mentioned in its advertising. You are to analyze the process of changing automobile engine oil. The subject
Gömböc shapes are interesting mathematical shapes attracting attention from mathematics enthusiasts. These blocks involve a complex manufacturing and molding process. A manufacturer is evaluating
While undertaking a degree in operations management, you are interested in applying for internships in this field. These jobs are advertised in job portals such as Monster, business networking
As part of a COVID-19 response team, you have to put together a group of volunteers to cook hot meals for 300 health workers at a local hospital. The menu consists of the following items: flavored
Rick DeNeefe, manager of the Golden Valley Bank credit authorization department, recently noticed that a major competitor was advertising that applications for equity loans could be approved within 2
A hospital emergency service department was analyzing the factors that were contributing to failing performance against response time targets set for urgent care response calls. It listed the main
Assume you are working as an intern in the accounts payable department of a construction company. As an intern, you have to process the invoices you receive from suppliers on a weekly basis. You
A business school undertook research to investigate the reasons for high-level absenteeism and lack of engagement from its students. It conducted a group discussion with students to uncover the key
A leading domestic gas meter manufacturer was facing a wide range of quality issues and observed wastage at several stages of the supply chain. It analyzed performance data of the process over a
Transport Research Laboratory, a UK-based global company, undertook a research to identify factors that contributed to the increasing number of road accidents. In its report titled “The effects of
The Watson Electric Company produces incandescent lightbulbs. The following data on the number of lumens for 40-watt lightbulbs were collected when the process was in control.a. Calculate control
Polar Magnets Limited is a global supplier of neodymium magnets. Based in Japan, it manufactures magnets of various sizes and shapes such as circular, rectangular, cylindrical, and spherical.
Busybee Fabricators are manufacturers of high-quality steel chests used for storing car repair tools. All chests are subjected to rigorous quality checks prior to dispatch. As a quality assurance
The data processing department of the Arizona Bank has five data entry clerks. Each working day their supervisor verifies the accuracy of a random sample of 250 records. A record containing one or
Protect life. Protect truth. That's the mission of Axon, the company that produces public safety technologies such as Taser electrical smart weapons and body cameras for law enforcement around the
Pano Lefkara is a village in Cyprus known for its lace and silver handicrafts. Their handmade embroidery design is used in tablecloths, curtain borders, and mats. However, the art is slowly dying as
The McGranger Mortgage Company is interested in monitoring the performance of the mortgage process. Fifteen samples of five completed mortgage transactions each were taken during a period when the
Pioneer Chicken advertises “lite” chicken with 30 percent fewer calories. (The pieces are 33 percent smaller.) The process average distribution for “lite” chicken breasts is 420 calories,
The Minnow County Highway Safety Department monitors accidents at the intersection of Routes 123 and 14. Accidents at the intersection have averaged three per month.a. Which type of control chart
A cake manufacturing business based in London has 120 branches spread all over the city. All cakes are customized as per the needs of the customers, including type of cake and choice of toppings. For
Matrix Enterprises manufactures molded plastic chairs of various sizes and colors using the blow molding process. However, due to improper maintenance, defects have been steadily increasing. The
Furniture Mart makes bespoke and standard household furniture such as table, chairs, and cots using a variety of material such as wood, steel, and plastic. Due to rapid expansion and heavy workload,
Ferrous steel company manufactures steel plates for the construction industry. During fabrication, it faces various defects such as blisters, cracks, and porosity. Since there could be internal
The McGranger Mortgage Company of Problem 6 made some changes to the process and undertook a process capability study. The following data were obtained for 15 samples of size 5. On the basis of
Metcalf, Inc., manufactures engine assembly brackets for two major automotive customers. The manufacturing process for the brackets consists of a cell containing a forming operation, a drilling
Marodin Brothers, Inc., is conducting a study to assess the capability of its 150-gram bar soap production line. A critical quality measure is the weight of the soap bars after stamping. The lower
A manufacturer of glass panes received a new order from a customer to supply 18 millimeters thick glass planes with a tolerance of +/-2 millimeters. The manufacturer is concerned about the capability
A company using a Kanban system has an inefficient machine group. For example, the daily demand for part L105A is 3,000 units. The average waiting time for a container of parts is 0.8 day. The
Copper Kettle Catering (CKC) is a full-service catering company that provides services ranging from box lunches for picnics or luncheon meetings to large wedding, dinner, or office parties.
Assume you are a management consultant tasked with improving the efficiency of a production process of an FMCG product of your choice. List the steps you will take to draw the value stream map. Who
Terai Motors buys semi-finished products from suppliers and assembles them based on customer preferences. During the customization process, two wheels, one handlebar, one seat, and a luggage box are
A bread manufacturing firm has recently implemented a Kanban system for tracking the consumption of raw materials, especially wheat flour. The average daily demand for wheat is 2,500 kg. The firm's
A garment manufacturer is interested in using the data collected during value stream mapping to evaluate the current state performance of the capacity of its manual assembly line process and would
You have been asked to put together a capacity plan for a critical operation at the Surefoot Sandal Company. Your capacity measure is number of machines. Three products (men's, women's, and
A watch manufacturing company in Switzerland is considering the number of trays it must deploy in its manufacturing process. Watches are hand-assembled by a team of experienced watchmakers and sent
Rollin King and Herb Kelleher started Southwest Airlines in 1971 with this idea: If they could take airline passengers where they want to go, on time, at the lowest possible price, and have a good
Fitness Plus is a full-service health and sports club in Greensboro, North Carolina. The club provides a range of facilities and services to support three primary activities: fitness, recreation, and
The base case for Grandmother's Chicken Restaurant (see Example 5.2) is to do nothing. The capacity of the kitchen in the base case is 80,000 meals per year. A capacity alternative for Grandmother's
A waste management company currently operates 25 trucks per day for collecting domestic waste. Observations in recent weeks show that the trucks are operating at a capacity of 70 percent, allowing
Excess capacity of a firm can lead to underutilization of its assets, while a decision to decrease capacity can result in lost opportunities. Identify examples where businesses have incurred
A manufacturer of bespoke handmade candles employs 2 machine operators and 3 packers to process customer orders. This team of 5 works for 6 hours a day for 5 days a week (Monday-Friday). Together,
Bespoke Furniture Mart assembles office chairs in a variety of colors, frame sizes, and models. These can be broadly categorized as work chairs and meeting chairs. Identical chairs are produced in
Returning to Problem 4, the business now requires a 20 percent capacity cushion.Data from problem 4A manufacturer of bespoke handmade candles employs 2 machine operators and 3 packers to process
A sandwich manufacturing firm makes sandwich platters with 20 pieces per platter. Each platter takes 30 minutes to prepare and pack. After 12 platters, the surface is cleaned and sanitized, which
Best Water Limited is a provider of high-quality insulation material to trade and commercial establishments. It employs an army of sales agents who regularly work with architects and pitch their
A rice flour mill is seeking to maximize its productivity with an improved grinder. It can repair its existing machinery or buy a new one. For buying purposes, two alternative machines are in
Beginning in January of 2020, the United States faced an unprecedented health crisis of epic and global proportions. The COVID-19 coronavirus, originating in China, quickly spread around the globe,
They involve more automation in the kitchen and feature a special cooking process that retains the original-recipe taste of the chicken. Although the process is more capital intensive, it would drive
Brunel Engineering fabricates industrial ovens for hotels, schools, and restaurants. The company is planning to expand and export its products overseas. The current manual method of materials
Khushi's Kitchen offers both vegetarian and nonvegetarian lunch for office workers. The peak period for the business is between 12:15 p.m. and 14:15 p.m. Due to limited space, customers form a queue,
Returning to Problem 5, if weekly demand for the four shirts is formal shirt = 5 units, polo shirt = 25 units, printed shirt = 10 units, and T-shirt = 82 units, which activity is the bottleneck now,
A garment tailoring company in Shanghai specializes in four types of shirts, namely formal shirts, polo shirts, printed shirts, and T-shirts. The following table shows how long it takes to process
What actions can be undertaken to minimize the impact of bottleneck?
Your company has just received an order from a good customer for a specially designed electric motor. The contract states that, starting on the 13th day from now, your firm will experience a penalty
An advertising project manager developed the network diagram shown in Figure 7.10 for a new advertising campaign. In addition, the manager gathered the time information for each activity, as shown in
Fabulous Ice-cream Limited manufactures and distributes ice-creams to various retail outlets in India. The company manufactures a wide variety of flavors and the product mix is determined by giving
The trim line at PW is a small subassembly line that, along with other such lines, feeds into the final chassis line. The entire assembly line, which consists of more than 900 workstations, is to
The senior management at Canine Kernels Company (CKC) mentioned in Problem 4 is concerned with the existing capacity limitation, so senior management wants to accept the mix of orders that maximizes
Remarkable and Co. manufactures and assembles bicycles using six distinct work elements. Each workstation is managed by one employee. Remarkable would like to assemble eight bikes in each 10-hour
A bespoke furniture manufacturer requires a production line to manufacture 25 chairs with engravings per week, while operating only 40 hours per week. There are only four steps required to produce a
Consider the following data for a project to install a new server at the Northland Pines High School.a. Draw the network diagram.b. Calculate the critical path for this project.c. How much slack is
Choice Hotels International is the company behind well-known hotel brands that range from budget-friendly EconoLodge and Rodeway Inns to Quality, Comfort Inns and its luxury brands, Ascend and
Roberts Auto Sales and Service (RASAS) consists of three car dealerships that sell and service several makes of American and Japanese cars, two auto parts stores, a large body shop and car painting
The following information is known about a project to upgrade a point-of-sale system at Kids and Tots Apparel.a. Draw the network diagram for this project.b. Determine the critical path and project
Consider the following data for a project to reorganize the office space at Platinum Financial Advisors.a. Draw the network diagram for this project.b. Identify the critical path and estimate the
Risk is a measure of the probability and consequence of not reaching a defined project goal. Assume you are the project manager for a construction project. Identify the major risks to the project’s
Good Souls, a charitable organization, is embarking on a new project aimed at rehabilitating prisoners by providing them with education, occupational skills, and financial support. The following data
Table 7.4 provides information about a refurbishment project of a residential property.a. How many weeks will it take to complete this project and what is the total slack?b. As the project manager,
Computer Systems Limited is currently deploying a nationwide CRM software system across all its retail outlets. Upon examination, the company realized it can reduce project duration by deploying
Table 7.8 contains data for the installation of imported generators from Germany in your office premises in Nigeria. The indirect costs are €200 per week, and a penalty cost of €900 per week will
Nova Limited is a well-known manufacturer of coldpressed olive oil in Cyprus. The company's unique value proposition is that olives are crushed into a paste by using stone grinders and then pressed
A certain food item at P&Q Supermarkets has the demand pattern shown in the following 24-period table.a. Use the combination forecasting method of the Time Series Forecasting Solver of OM
Marianne Schwartz, the owner of Handy Man Rentals, rents carpet cleaners to contractors and walk-in customers.She is interested in arriving at a forecast of rentals so that she can order the correct
Parts Emporium, Inc., is a wholesale distributor of automobile parts formed by two disenchanted auto mechanics, Dan Block and Liya Kimathi. Originally located in Block's garage, the firm showed slow
Managing inventory at Crayola is a fine balancing act. With the back-to-school period driving 42 percent of company demand for crayons, markers, paints, modeling compounds, and other products,
A distribution center experiences an average weekly demand of 50 units for one of its items.The product is valued at $650 per unit. Inbound shipments from the factory warehouse average 350 units.
Sam's Pet Hotel operates 52 weeks per year, 6 days per week, and uses a continuous review inventory system. It purchases kitty litter for $11.70 per bag. The following information is available about
Consider again the kitty litter ordering policy for Sam's Pet Hotel in Problem 13.a. Suppose that the weekly demand forecast of 90 bags is incorrect and actual demand averages only 60 bags per week.
A supermarket in London sells 750 kg of rice per month from Thailand. The ordering cost is £250 and the holding cost is £0.75 per kg per year.a. How much rice should the supermarket order at a
Big Builder (BB) sells construction equipment such as concrete mixer, wheelbarrow, and angle grinders to highway agencies who use them for road construction. BB receives orders from multiple agencies
You are a manufacturer of precision components for the automotive industry. Your supplier reviews stock every 4 weeks and replenishes it instantaneously. The standard deviation of demand during the
In a two-bin inventory system, the demand for 3-inch lag bolts during the 2-week lead time is normally distributed, with an average of 53 units per week. The standard deviation of weekly demand is 5
An e-commerce retailer is trading a successful haircare product imported from overseas suppliers. It takes 6 weeks for the item to reach the warehouse from suppliers. Due to various import
Roland provides custom-made coffee mugs, saucers, keychains, magnets, and other souvenirs sought after by tourists visiting the Eiffel Tower. It purchases plain coffee mugs from a wholesaler in
Northwoods Living is a country store specializing in knick-knacks suitable for a farmhouse décor. One item experiencing a considerable buying frenzy is a miniature Holstein cow. Average weekly
Suppose that Sam's Pet Hotel in Problem 13 uses a P system instead of a Q system. The average daily demanda. What P (in working days) and T should be used to approximate the cost trade-offs of the
A cricket specialty wholesaler operates 50 weeks per year. Management is trying to determine an inventory policy for its bats, which have the following characteristics: Demand (D) = 350,000
Bob Carlton's golf camp estimates the following staff requirements for its services over the next 2 years.regular time and can work an additional 120 hours overtime. Regular-time wages and benefits
When Netflix releases a new season for a popular series, the number of its viewers is likely to increase substantially. Do you think the concepts of operations planning can be used for satisfying the
Revisit Example 10.3, in which the consulting company has five jobs in its backlog. Create a schedule using the EDD rule, calculating the average days past due and flow time. In this case, does EDD
Consider Managerial Practice 10.1 and the scheduling of Major League Baseball umpires. Relate the three levels in Figure 10.2 to the seasonal production of baseball games.Managerial Practice
A shipyard services ships and makes it seaworthy as per the regulations. Management schedules overtime during periods of high demand to reduce backlog. The following ships need to be scheduled for
Currently a company that designs online instructional courses has five customers in its backlog. The day when the order arrived, processing time, and promised due dates are given in the following
Zenith Printers specializes in printing wedding cards, business cards, corporate brochures, and marketing leaflets. The company serves a wide range of commercial and noncommercial clients. Due to the
Complete the MPS record in Figure 11.29 for a single item. Item: A Quantity on Hand: Forecast Customer orders (booked) Projected on-hand inventory MPS quantity MPS start 35 1 2 3 20 18 28 15
Founded in 1921 by four physicians with a mission to provide better care for the sick, investigate patient problems, and further educate those who serve, Cleveland Clinic is one of the world's most
This Active Model is available online. It allows you to evaluate the relationship between the inventory record data and the planned order releases.QUESTIONS1. Suppose that the POQ for item B is
Complete the MPS record shown in Figure 11.30 for a single item. Item: A Quantity on Hand: Forecast Customer orders (booked) Projected on-hand inventory MPS quantity MPS start 75 1 65 January 2 65 40
Figure 11.31 shows a partially completed MPS record for ball bearings.a. Develop the MPS for ball bearings.b. Four customer orders arrived in the following sequence:Assume that you must commit to the
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