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operations management

Operations Management Processes And Supply Chains 13th Global Edition Lee Krajewski, Naresh Malhotra, Larry Ritzman - Solutions

In which method of work measurement do we need to split the job into basic elements, measure distances involved, and rate the difficulty?a) Work samplingb) Predetermined time data approachc) Elemental time data approachd) Time study
Which type of work measurement technique would we need to currently use for manufacturing in space and why?
Which of the following enables a worker to more effectively see the big picture?a) Work samplingb) Job enrichmentc) Job enlargementd) Job rotation
The Arkade Company has decided to use a 12 percent allowance factor based on job time. Calculate the standard time for each work element and for the total job.
Students in an operations management class have been assigned eight similar computer homework problems. Alexis needed 30 minutes to complete the first problem. Assuming a 75 percent learning curve, how much total time will Alexis need to complete the assignment?
The Arkade Company is considering switching to a 12 percent allowance based on time worked. Calculate the new standard time for each work element and for the total job.
Tameka Nicholas believes there must be a better aggregate plan. She has suggested a hybrid plan, using a permanent workforce of 195 employees and subcontracting as needed. Once again, Tameka has requested that you provide the following information:a) Calculate the regular-time production possible
Tameka wants you to consider a hybrid aggregate plan, using up to the maximum overtime per employee for any period where demand cannot be satisfied with the current regular-time production and the available inventory. Back orders can occur.a) Show what would happen if this plan were implemented.b)
What are the benefits of companies utilizing ERP software in the cloud?
Which of the following accurately describes capacity requirements planning (CRP)?a) It uses data from the master production schedule (MPS).b) Only critical work centers are evaluated.c) Only the processing times for the jobs are needed.d) Workloads are calculated for all work centers.
What actions has SAP taken to protect data security and privacy?
Which of the following is an output of material requirements planning (MRP)?a) Inventory recordsb) Schedule of replenishment ordersc) Bill of material filed) Master production schedule
1. Should Gabriela be worried about what she sees in the MRP system? Why?2. Offer suggestions on how to address any problems identified.3. Should Gabriela consider handling some situations by exceptions rather than by a rule? Explain when it may be important to make exceptions to an analytics
Which companies are the largest ERP providers? Which companies are partnering in the cloud with SAP?
Which of the following consists of the three processes of production planning, master production scheduling and capacity requirements planning?a) Enterprise resource planning (ERP)b) Material requirements planning (MRP)c) Manufacturing resource planning (MRP II)d) Closed loop MRP
Using the given information, calculate the gross requirements for each of the components when the company plans to build 80 of its Q Models if you have these inventories: 80 units of component T and 200 units of component R. Item Q R S T X Y V Z Usage per Parent نما 2 1 3 2 1 2 Load
In general, describe the factors which can cause problems for successful usage of MRP?
Compare and contrast the lot sizing rules of lot-for-lot (L4L), fixed-order quantity (FOQ), and period-order quantity (POQ).
What is the most critical factor for a successful enterprise resource planning (ERP) implementation?a) Insufficient trainingb) Lack of fundingc) Lack of testingd) Leadership and top management commitment
Cathy’s Coney Islands has just purchased new equipment. Cathy believes the improved efficiency will reduce the number of people needed Monday through Friday down to five. She does not believe she can ever have fewer than three persons working, so the weekend requirements remain the same. Develop
Cathy’s Coney Islands operates seven days per week. Demand is relatively constant during the week and tails off on the weekend. She estimates that she needs six employees Monday through Friday, and three employees on Saturday and Sunday. She is committed to giving each employee two consecutive
Which priority rule for scheduling minimizes mean job lateness?a) First come, first served (FCFSb)b) Earliest due date (EDD)c) Shortest processing time (SPT)d) Slack per remaining operations (S/RO)
Compare and contrast the optimized production technology (OPT) (also known as the Theory of Constraints [TOC]) scheduling process with the typical approach of other priority rules.
Which of the following accurately describes one of the concepts of the scheduling approach of optimized production technology (OPT), which is also known as the Theory of Constraints (TOC)?a) Focus on maximizing efficiencies on all resources.b) Transfer and process batches should be equal.c) Process
Compare and contrast the priority scheduling rules of shortest processing time (SPT) and first come, first served (FCFS).Which would be more appropriate for Verizon to utilize?
Which applies when using the critical ratio (CR) to schedule work?a) A CR of more than 1.0 means that the job has some slack.b) A job with a CR of 1.0 should be given highest priority.c) A job with a CR of 2.0 should be scheduled first.d) We first schedule the job with the highest CR.
Why is scheduling in service environments (like Verizon) more difficult and how can we effectively manage it?
1. In what sequence should these deliveries be made so that all constraints are met?2. What other scheduling criteria should Ms. Carver consider that are not included in the sequencing algorithm?
Which priority rule for scheduling achieves lower work-in-process inventory?a) First come, first served (FCFS)b) Earliest due date (EDD)c) Shortest processing time (SPT)d) Slack per remaining operations (S/RO)
Describe the scheduling software offered and used by Verizon after reading this article:https://www.contractormag.com/technology/fleet-management/article/20884124/verizon-connect-simplifies-dispatching-scheduling-and-job-management
Which performance measure is the best indicator of efficiency?a) Mean job flow timeb) Average number of jobs in the systemc) Percentage on time in full of ordersd) Level of work-in-process inventory
Using the given information and the beginning inventories from Problem 4, calculate the minimum replenishment time for the 80 Q Models.Data from Problem 4Using the given information, calculate the gross requirements for each of the components when the company plans to build 80 of its Q Models if
How did Verizon schedule the rollout of its 5G service?
Which lot sizing rule minimizes inventory levels?a) Economic order quantity (EOQ)b) Lot-for-lotc) Period-order quantityd) Fixed-order quantity
Operations processes are at the heart of Crayola, the Easton, Pennsylvania, maker of crayons, markers, and paints loved by children of all ages around the world. Since 1903, the company has been taking wax, dyes, and other raw materials and turning them into a colorful array of products sold
This Active Model is available online. It allows you to evaluate the important elements of labor productivity.Microsoft® Windows® and Microsoft Office® are registered trademarks of the Microsoft Corporation in the United States and other countries. This book is not sponsored or endorsed by or
Cleveland Clinic is one of the nation's most respected research and academic hospitals, garnering top ratings annually in U.S. News and Word Reports rankings of healthcare providers for more than two decades. Headquartered in Cleveland, Ohio, the organization has more than 260 facilities throughout
Chad's Creative Concepts designs and manufactures wood furniture. Founded by Chad Thomas on the banks of Lake Erie in Sandusky, Ohio, the company began by producing custom-made wooden furniture for vacation cabins located along the coast of Lake Erie and on nearby Kelly's Island and Bass Island.
1. What percentage of overall complaints does discourteous service account for?2. What percentage of overall complaints do the three most common complaints account for?3. How does it affect the chart if we eliminate discourteous service? D Ele Edit View Insert Format Tools
Custom Molds, Inc., manufactures custom-designed molds for plastic parts and produces custom-made plastic connectors for the electronics industry. Located in Tucson, Arizona, Custom Molds was founded by the father-and-son team of Tom and Mason Miller in 1997. Tom Miller, a mechanical engineer, had
Thomas Cope, located in Bolton, England, is a manufacturer of stainless steel exhaust hoods used in industrial kitchens. The firm works 20 days a month, and each employee works an average of 8 hours per day. To keep costs down, Thomas Cope employs labor with limited experience. This causes quality
Vera Johnson and Merris Williams manufacture vanishing cream. Their packaging process has four steps:(1) Mix,(2) Fill,(3) Cap,(4) Label. They have had the reported process failures analyzed, which shows the following:Draw a Pareto chart to identify the vital failures. Process failure Lumps of
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 manufacturing process, instead of sourcing them from external suppliers? How would these considerations
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 of the study is the service mechanic. The process begins when the mechanic directs the customer’s
Gömböc shapes are interesting mathematical shapes attracting attention from mathematics enthusiasts. These blocks involve a complex manufacturing and molding process. A manufacturer is evaluating three machines that can be used for producing these shapes. The annual capital and variable costs
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 portals such as LinkedIn, and in many cases through word of mouth. You are also planning to use novel
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 rice, tomato soup, vegetable salad, chocolate cake, and a bottle of fresh juice. All items except the
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 working days. Because fast credit approval was a competitive priority, DeNeefe wanted to see how
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 issues that prevented the ambulance from bringing the patient back to the hospital on time.a. Use a
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 receive an average of 200 invoices per week. Suppliers send their invoices by post and email. The
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 reasons that could be classified into the following categories.a. Draw a Pareto chart to identify the
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 period of one month. The table presents the results.Draw a Pareto chart to identify the key issues the
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 drivers’ speed on the frequency of road accidents,” it gathered the following data on the
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 limits for an R-chart and an X̅-chart.b. Since these data were collected, some new employees were
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. Recently, it introduced a new ring-shaped magnet with a diameter of 25 mm and a pull strength of 6.5 kg.
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 professional, you have been tasked to examine the reasons for rejects and present your findings to the
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 more errors is considered defective and must be redone. The results of the last 30 samples are shown
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 globe. In business since 1993, the company manufactures three weapons lines inside its high-tech
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 village population is migrating to urban areas. Do you think it is a good idea to replace this
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 process was believed to be in control. The times to complete the transactions were measured. The means
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, with a standard deviation of the population of 25 calories. Pioneer randomly takes samples of six
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 should be used? Construct a control chart with three-sigma control limits.b. Last month, seven
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 quality control and consistency, cakes are manufactured at a central location and distributed to
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 following results are obtained from a random examination of 10 samples:a. Assuming 10 observations are
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, the quality department identified a number of defects. The furniture could be flawed in various
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 cracks, testing plates can be a challenge and hence it adopts nondestructive testing techniques through
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 individual observations, management estimated the process standard deviation to be 4.21 (days) for use in
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 operation, a finish grinding operation, and packaging, after which the brackets are staged for shipping.
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 and upper specification limits are 162 and 170 grams, respectively. As a part of an initial capability
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 of the process to produce this glass. The following data were randomly collected during five shifts
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 processing time for a container of L105A is 0.2 day, and a container holds 270 units. Currently, 20
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. Established as a lunch delivery service for offices in 1972 by Wayne and Janet Williams, CKC has grown to be
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 will you engage and what data will you collect? Identify challenges you might encounter in this
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 attached to develop the end product. Wheels are attached in workstation 1, while handlebar, seat,
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 records show that it takes around 4 hours for the flour to be transformed into bread and another 4
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 like to identify the ideal batch size for its operations. The productive capacity of the staff is 420
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 children's sandals) are manufactured. The time standards (processing and setup), lot sizes, and demand
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 in a purpose-built watch holding tray for quality assurance.Each tray can hold 30 watches. The
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 time while doing it, people would love to fly their airline. The result? No other airline in the
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 relaxation. Fitness activities generally take place in four areas of the club:(1) The aerobics
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 Chicken Restaurant is a two-stage expansion. This alternative expands the kitchen at the end of year
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 for just a 10 percent capacity cushion. Due to population growth, more waste will be generated and
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 substantial losses due to excess capacity and vice versa. Explain the reasons that may have resulted in this
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, they make 100 candles per hour which are packed in boxes of 10. A machine operator and a packer
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 lots of 50. The projected demand, lot size, and time standards are shown in the following table.The
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 customer orders. This team of 5 works for 6 hours a day for 5 days a week (Monday-Friday). Together,
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 requires a 1-hour changeover. The company operates 7.5 hour shifts, 3 shifts per day, 220 days per
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 products. The sales agents are remunerated based on performance and are usually paid 20 percent of sales
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 consideration. Machine A costs £125,000 but yields a 10 percent savings over the current machine used.
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, causing hundreds of thousands of deaths and impacting the lives of millions everywhere. In the United
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 down labor costs, so the pretax profit for all sales (not just the sales from the capacity added)
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 handling and assembly is inefficient.Brunel is considering a one-year lease of an industrial robot to
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, pick the food they want, and pay at the end. They start with a single line for starters and then
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, and is the factory capable of producing all the shirts demanded? How many additional number of
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 each shirt through each required activity. Note that all times are in minutes. The factory is open 8
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 of $100 per day until the job is completed. Indirect project costs amount to $200 per day. The data
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 the accompanying table.a. Calculate the expected time and variance for each activity.b. Calculate
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 resource priority to the highest contribution margin ice-cream. The ice-cream manufacturing process
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 make PW's new E cars. The trim line itself involves only 13 work elements and must handle 20 cars per

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