Question: The following jobs are waiting to be

> What is the overall reliability that bank loans will be processed accurately if each of the five clerks shown in the chart has the reliability shown? Hint: The three paths are done in parallel, followed by an additional independent step.

> What is the reliability of the following parallel production process? R1 = 0.95, R2 = 0.90, R3 = 0.98.

> A manufacturer of disk drives for notebook computers wants an MTBF of at least 50,000 hours. Recent test results for 10 units were one failure at 10,000 hours, another at 25,000 hours, and two more at 45,000 hours. The remaining units were still running

> Robert Klassen Manufacturing, a medical equipment manufacturer, subjected 100 heart pacemakers to 5,000 hours of testing. Halfway through the testing, 5 pacemakers failed. What was the failure rate in terms of the following? a) Percentage of failures? b)

> A new aircraft control system is being designed that must be 98% reliable. This system consists of three components in series. If all three of the components are to have the same level of reliability, what level of reliability is required?

> Given the probabilities that follow for Ronny Richardson’s print shop, find the expected breakdown cost. The cost per breakdown is $10.

> The fire department has a number of failures with its oxygen masks and is evaluating the possibility of outsourcing preventive maintenance to the manufacturer. Because of the risk associated with a failure, the cost of each failure is estimated at $2,000

> David Hall, chief of the maintenance department at Mechanical Dynamics, has presented you with the following failure curve. What does it suggest?

> Everyone—managers and hourly employees alike—who goes to work for Hard Rock Cafe takes Rock 101, an initial 2-day training class. The Hard Rock value system is to bring a fun, healthy, nurturing environment into the Hard Rock Cafe culture. This initial c

> A testing process at Boeing Aircraft has 400 components in series. The average reliability of each component is 99.5%. Use Figure 17.2 to find the overall reliability of the whole testing process. Data from Figure 17.2:

> Each breakdown of a graphic plotter table at Airbus Industries costs $50. Find the expected daily breakdown cost, given the following data:

> What are the expected number of yearly breakdowns for the power generator at Orlando Utilities that has exhibited the following data over the past 20 years?

> You have a system composed of a serial connection of four components with the following reliabilities: What is the reliability of the system?

> The credit card issuing process at Atlanta Bank’s VISA program consists of 10 steps performed in series by different bank employees. The average reliability of each employee is 98%. Use Figure 17.2 in the text to help manager Yusen Xia

> A typical retail transaction consists of several smaller steps, which can be considered components subject to failure. A list of such components might include: Let the eight probabilities of success be .92, .94, .99, .99, .98, .97, .95, and .96. What is

> As VP for operations at Méndez-Piñero Engineering, you must decide which product design, A or B, has the higher reliability. B is designed with backup units for components R3 and R4. What is the reliability of each design?

> Rick Wing, salesperson for Wave Soldering Systems, Inc., has provided you with a proposal for improving the temperature control on your present machine. The machine uses a hot-air knife to cleanly remove excess solder from printed circuit boards; this is

> Elizabeth Irwin’s design team has proposed the following system with component reliabilities as indicated: What is the reliability of the system? Hint: The system functions if either R2 or R3 work.

> How much would reliability improve if the medical control system shown in Problem 17.9 changed to the redundant parallel system shown in Problem 17.10? Data from Problem 17.9: A medical control system has three components in series with individual relia

> With thousands of employees spread across nearly 100 locations in the United States, Mexico, and Canada, building a committed and cohesive workforce is a challenge. Yet Alaska Airlines is making it work. The company’s “people” focus states: “While airpla

> What is the reliability of the system shown?

> The Beta II computer’s electronic processing unit contains 50 components in series. The average reliability of each component is 99.0%. Using Figure 17.2, determine the overall reliability of the processing unit. Data from Figure 17.2:

> The distributor of lighting system mentioned in Problem 16.8 has decided to implement a Lean management program. As a result, the firm has signed a long-term contract with a supplier to place orders online, which will reduce ordering cost to LE 100 per o

> 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 year, and ordering cost from supplier is LE 2,000 per or

> Maggie Moylan Motorcycle Corp. uses kanbans to support its transmission assembly line. Determine the size of the kanban for the mainshaft assembly and the number of kanbans needed.

> Pauline Found Manufacturing, Inc., is moving to kanbans to support its telephone switching-board assembly lines. Determine the size of the kanban for subassemblies and the number of kanbans needed. Setup cost = $30 Annual holding cost = $120 per subassem

> Tej Dhakar’s company wants to establish kanbans to feed a newly established work cell. The following data have been provided. How many kanbans are needed?

> Al-Arabi Company in Egypt is a manufacturer of steel knobs. The manager decided to introduce the Kanban system to reduce inventory. Using the information in the table below, how many Kanbans are required?

> Rick Wing has a repetitive manufacturing plant producing automobile steering wheels. Use the following data to prepare for a reduced lot size. The firm uses a work year of 305 days. a) What is the setup cost, based on the desired lot size? b) What is the

> Given the following information about a product at Michael Gibson’s firm, what is the appropriate setup time? Annual demand = 39,000 units Daily demand = 150 units Daily production = 1,000 units Desired lot size = 150 units Holding cost per unit per year

> Fast & Fresh Pastry is a medium-sized company in Australia, specialized in baking and distributing pastries in high volumes. They serve gas stations, convenience stores, and cafeterias. Their products line includes cinnamon rolls, croissants, bear cl

> 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 = $25 Annual holding cost = $200 per subassembly Daily produc

> 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. After several hours of analysis, you develop the following

> How do the answers to Problems 16.8 and 16.9 provide insights about the implementation of JIT Lean Management Systems? Data from Problem 16.8: A distributor of lighting system in Egypt uses the EOQ model to manage its inventory from LED light bulbs. The

> Randas Commercial Bakery produces cupcakes to be sold in supermarkets in Egypt. The production line is available 12 hrs/day and is currently producing in large lots. The manager wants to reduce the production cycle to 4 hours. Given the data below, what

> Daniel Glaser, chairman of the College of San Antonio’s business department, needs to assign professors to courses next semester. As a criterion for judging who should teach each course, Professor Glaser reviews the past 2 yearsâ&

> Tigers Sports Club has to select four separate coed doubles teams to participate in an interclub table tennis tournament. The preselection results in the selection of a group of four men—Raul, Jack, Gray, and Ajay—and

> The Baton Rouge Police Department has five detective squads available for assignment to five open crime cases. The chief of detectives, Jose Noguera, wishes to assign the squads so that the total time to conclude the cases is minimized. The average numbe

> Jamison Day Consultants has been entrusted with the task of evaluating a business plan that has been divided into four sections—marketing, finance, operations, and human resources. Chris, Steve, Juana, and Rebecca form the evaluation te

> A sales manager for a large construction equipment company has offices in four Saudi Arabia cities. As part of the monthly assignment, the manager wants a salesman from each office to fly and meet buyers in four other cities. The table below shows the co

> The marketing manager of a pharmaceutical company in Saudi Arabia has four salesmen that can serve four different sales regions. Considering the capabilities of the salesmen, their knowledge of the different medical providers, and the nature of regions,

> When President Bob Collins began his career at Wheeled Coach, the world’s largest manufacturer of ambulances, there were only a handful of employees. Now the firm’s Florida plant has a workforce of 350. The physical plant has also expanded, with offices,

> Given the following demand for waiters and waitresses at S. Ghosh Bar and Grill, determine the minimum wait staff needed with a policy of 2 consecutive days off.

> Four employees are to be assigned to four different jobs. The time per job per employee in minutes is given in the table below. Find the optimal assignment of employees to jobs to minimize the total completion time.

> The table below shows the weekly demand for security officers at a small mall in Kuwait. Determine the minimum number of security officers needed with 2 consecutive days off.

> Drew Rosen Automation Company estimates the data entry and verifying times for four jobs as follows: In what order should the jobs be done if the company has one operator for each job? Illustrate the time-phased flow of this job sequence graphically.

> At the campus copy shop, six jobs have arrived in the order shown (A, B, C, D, E, and F) at the beginning of the day (today, which is a workday). All of the jobs are due at various times today. Your task is to evaluate four common sequencing rules. a) Se

> Courtney is a programmer receiving requests each week to analyze a large database. Five jobs were on her desk Monday morning, and she must decide in what order to write the code. Assume that all jobs arrived today (day 1 and hour 1) in the order shown be

> Kamauf Custom Glass, Inc., manufactures custom windows primarily for homes and churches. Small repair jobs may take a few hours, but larger jobs may take hundreds of hours. How to schedule the jobs is a continuing issue? The scheduler has decided to see

> Six jobs are to be processed through a two-step operation. The first operation involves sanding, and the second involves painting. Processing times are as follows: Determine a sequence that will minimize the total completion time for these jobs. Illustra

> The following set of seven jobs is to be processed through two work centers at George Heinrich’s printing company. The sequence is first printing, then binding. Processing time at each of the work centers is shown in the following table

> When Orlando’s Arnold Palmer Hospital began plans to create a new 273-bed, 11-story hospital across the street from its existing facility, which was bursting at the seams in terms of capacity, a massive planning process began. The $100

> The following jobs are waiting to be processed at Jeremy LaMontagne’s machine center. Today is day 250. Using the critical ratio scheduling rule, in what sequence would the jobs be processed?

> Sunny Park Tailors has been asked to make three different types of wedding suits for separate customers. The following table highlights the time taken in hours for (1) cutting and sewing and (2) delivery of each of the suits. Which schedule finishes soon

> First Printing and Copy Center has four more jobs to be scheduled, in addition to those shown in Example 3 in the chapter. Production scheduling personnel are reviewing the Gantt chart at the end of day 4. ◆ Job D was scheduled to begin early on day 2 an

> The following jobs are waiting to be processed at Julie Morel’s machine center: In what sequence would the jobs be ranked according to the following rules: (a) FCFS, (b) EDD, (c) SPT, and (d) LPT? All dates are according to shop calenda

> The following jobs are waiting to be processed at Rick Solano’s machine center. Solano’s machine center has a relatively long backlog and sets a fresh schedule every 2 weeks, which does not disturb earlier schedules. B

> An Alabama lumberyard has four jobs on order, as shown in the following table. Today is day 205 on the yard’s schedule. In what sequence would the jobs be ranked according to the following decision rules: a) FCFS b) SPT c) LPT d) EDD e)

> The following five overhaul jobs are waiting to be processed at Avianic’s Engine Repair Inc. These jobs were logged as they arrived. All dates are specified as planning calendar days. Assume that all jobs arrived on day 180; today&acirc

> The following jobs are waiting to be processed at the same machine center. Jobs are logged as they arrive: In what sequence would the jobs be ranked according to the following decision rules: (a) FCFS, (b) EDD, (c) SPT, and (d) LPT? All dates are specifi

> The Doan Modianos Manufacturing Company is putting out seven new electronic components. Each of Modianos’ eight plants have the capacity to add one more product to its current line of electronic parts. The unit manufacturing costs for p

> Jerry Wei, the hospital administrator at St. Charles General, must appoint head nurses to four newly established departments: urology, cardiology, orthopedics, and obstetrics. In anticipation of this staffing problem, he has hired four nurses, considered

> Henry Coupe, the manager of a metropolitan branch office of the state department of motor vehicles, attempted to analyse the driver’s license-renewal operations. He had to perform several steps. After examining the license-renewal proce

> Ravi Behara, the managing partner at a large law firm in Virginia, must assign three clients to three attorneys. Cost data are presented in the following table: Use the assignment algorithm to solve this problem.

> Dennis Geyer’s company wishes to assign a set of jobs to a set of machines. The following table provides data as to the cost of each job when performed on a specific machine. a) Determine the assignment of jobs to machines that will min

> Lifang Wu owns an automated machine shop that makes precision auto parts. He has just compiled an input–output report for the grinding work center. Complete this report and analyse the results.

> Ron Satterfield’s excavation company uses both Gantt scheduling charts and Gantt load charts. a) Today, which is the end of day 7, Ron is reviewing the Gantt chart depicting these schedules: ◆ Job #151 was scheduled to begin on day 3 and to take 6 days.

> Keebock, a maker of outstanding running shoes, keeps the soles of its size 13 running shoes in inventory for one period at a cost of $.25 per unit. The setup costs are $50. Beginning inventory is zero, and lead time is 1 week. Shown here are the net requ

> Green Toys, a toy manufacturer in Cairo, Egypt, has the following master production plan: Lead time = 1 week; setup costs = E£2,000; holding cost = E£5 per unit per week; Stock-out cost = E£10 per unit per week. Dev

> You need to schedule 10 units of product Alpha for delivery in 6 weeks. Three units of D and 2 units of F are required for each Alpha. The lead time for Alpha is 1 week. Lead time for D is 1 week, and lead time for F is 2 weeks. a) Construct a product st

> Using the data in Problem 14.18, develop net material requirement plans for the toy and Item A. Data from Problem 14.18: A toy manufacturer has an outstanding order of 1,000 units for one of its toys in week 7. The table below provides information about

> A toy manufacturer has an outstanding order of 1,000 units for one of its toys in week 7. The table below provides information about the components, on-hand inventory, and lead time. Subscripts indicate quantity required for each parent. Assume lot-for-l

> Your stockroom manager, Mehmet Altag, arrived at your desk just after you had completed the net requirements plan for product A (use data in Figure 14.14 and Problem 14.15), exclaiming that the cycle counter should be fired. It seems that the cycle count

> Some people would say that Oliver Munday, Hard Rock’s vice president for cafe development, has the best job in the world. Travel the world to pick a country for Hard Rock’s next cafe, select a city, and find the ideal

> A motherboard manufacturer in China has received the following demand estimates for the next 6 months: a) The firm has estimated the carrying costs to be 10 Yuan per unit per month, stock-out costs to be 40 Yuan per unit, regular production costs to be 1

> You manage a consulting firm down the street from Consuelo Chua, Inc., and to get your foot in the door, you have told Ms. Chua (see Problem 13.7) that you can do a better job at aggregate planning than her current staff. She said, “Fin

> The exclusive Swink Golf Driving Range has had a standard price of $15 per hour. The facility has 36 golfing stations, with average usage of 50%, 10 hours a day, 7 days a week. Morgan Swink, the owner, would like to enhance revenue. He proposes new prici

> The James Lawson Chemical Supply Company manufactures and packages expensive vials of mercury. Given the following demand, supply, cost, and inventory data, allocate production capacity to meet demand at minimum cost using the transportation method. A co

> Maple Leaf Foundary, owned by Ahmet Satir, produces cast-iron ingots according to a 3-month capacity plan. The cost of labour averages $100 per regular shift hour and $140 per overtime (O.T.) hour. Inventory carrying cost is thought to be $4 per labour-h

> Consider the following aggregate planning problem for one quarter: Assume that there is no initial inventory and a forecasted demand of 1,250 units in each of the 3 months. Carrying cost is $1 per unit per month. Solve this aggregate planning problem for

> Develop two other plans for the Mexican roofing manufacturer described Solved Problem 13.1. a) For Plan 5, use constant workforce of eight workers for the first 3 months and ten workers for the last 3 months. Use subcontracting to meet the remainder of d

> The manufacturer of outdoor paints at Jebel Ali, Dubai, has collected the following information regarding the capacities (in units) and demand forecast for the next 9 months. Cost data are as follows: a) Develop a chase plan to meet the monthly demand us

> The production planning period for knobs at Al-Arabi Factory, Egypt, is 6 months. Cost data is as follows: For each of the next 6 months, capacity and demand data for knobs are as follows: Develop a production plan that minimizes costs using the transpor

> The production planning period for mobile boards at Sime Factory, Egypt, is 4 months. Cost data are as follows: For each of the next 4 months, capacity and demand data for boards are as follows: Develop a production plan that minimizes costs using the tr

> From its first Red Lobster in 1968, the chain has grown to 705 locations, with over $2.6 billion in U.S. sales annually. The casual dining market may be crowded, with competitors such as Chili’s, Ruby Tuesday, Applebeeâ€&#153

> Using the data in Problem 13.9, prepare the following two plans. Compare Plans C and D with Plans A and B and make a recommendation. ◆ Plan C – A chase plan. Assume the current workforce at 20 workers and productivity

> The table below provides information about the demand forecast and the number of working days for a tools manufacturing factory in Egypt. Construct a graph for the daily demand and the average daily demand forecast.

> The small boatyard White Kayaks built 156 epoxy kayaks last year. Each of these requires 12 kg of epoxy, purchased in 6-kg barrels at $170 each, with a freight cost of $18 per shipment plus $1/kg. The annual carrying cost is estimated to 20% of the value

> If D = 8,000 per month, S = $45 per order, and H = $2 per unit per month, a) What is the economic order quantity? b) How does your answer change if the holding cost doubles? c) What if the holding cost drops in half?

> William Beville’s computer training school, in Richmond, stocks workbooks with the following characteristics: Demand D = 19,500 units/year Ordering cost S = $25/order Holding cost H = $4/unit/year a) Calculate the EOQ for the workbooks. b) What are the

> Lynn Fish opened a new beauty-products retail store. There are numerous items in inventory, and Lynn knows that there are costs associated with inventory. However, because her time is limited, she cannot carefully evaluate the inventory policy for all pr

> The company organizing the famous rapper Sean Paul’s concert in Dubai has decided to print shirts to be sold at the event. The company has estimated that 20,000 attendees will attend the concert and, on an average, 40% of the attendees usually buy shirts

> Henrique Correa’s bakery prepares all its cakes between 4 a.m. and 6 a.m. so they will be fresh when customers arrive. Day-old cakes are virtually always sold, but at a 50% discount off the regular $10 price. The cost of baking a cake is $6, and demand i

> Beqala.com is an online grocery store that sells large fresh shrimps to customers in the area of Cairo, Egypt. The cost per kilo of shrimp is E£150 and it is sold at E£280 per kilo. The remaining shrimps at the end of the day are sold to a local restaura

> Demand during lead time for one brand of TV is normally distributed with a mean of 36 TVs and a standard deviation of 15 TVs. What safety stock should be carried for Dennis Yu’s Appliance Outlet to provide a 90% service level? What is the appropriate reo

> In October 2018, the top management of Southern Recreational Vehicle Company of St. Louis, Missouri, announced its plans to relocate its manufacturing and assembly operations to a new plant in Ridgecrest, Mississippi. The firm, a major producer of pickup

> Barbara Flynn’s company has compiled the following data on a small set of products: Perform an ABC analysis on her data.

> The distributor of Sumitomo Tires in Egypt estimates the annual demand of tires for next year to be normally distributed with a mean of 100,000 tires and a standard deviation of 3,000 tires. The ordering cost is estimated to be E£ 20,000 per order and th

> Gainesville Cigar stocks Cuban cigars that have variable lead times because of the difficulty in importing the product: lead time is normally distributed with an average of 6 weeks and a standard deviation of 2 weeks. Demand is also a variable and normal

> Metro hypermarket in Kuwait supplies juice boxes from a manufacturer in Saudi Arabia. Daily demand is almost constant at 100 boxes per day. The lead time for boxes delivery is normally distributed with a mean of 5 days and a standard deviation of 2 days.