Questions and Answers of Operations And Supply Chain Management

A manufacturing process involving machined components consists of two operations done on two different machines. The status of the queue at the beginning of a particular week is as follows:
At Lynwood Manufacturing, suppose the dispatcher uses the least work remaining rule (LWR) instead of FNO. Which job (job 2 or job 3) will be scheduled next on the drill press at time 30?
On Monday morning, Baxter Industries has the following jobs waiting for processing in two departments, milling and drilling, in that order.a. Develop a minimum makespan schedule using Johnson’s
For the scenario described in section 15.2c, suppose the number of employees needed for each hour are as shown in the following table:Develop and solve the optimization model on a spreadsheet and use
The minimum number of part-time employees needed at a quick service restaurant for each two-hour block is shown in the following table:Part time college students work four-hour shifts (e.g., 7-11
David Chris is running the season’s final basketball tournament for Youth Boosters. He is trying to schedule the referee crews for each game. The following table shows the number of times in the
An earth moving machine had five jobs in the same area it must complete as soon as possible. Sequence the jobs using (a) FCFS order 1-2-3-4-5, and (b) the SPT rule. Use the Sequencing Excel
Tony’s Income Tax Service personnel can estimate the time required to complete customers’ tax returns by using the following time standards assuming all information is available.One morning, five
Four blood samples have arrived in your laboratory with the following information. Use the Excel Sequencing template for the following:a. Sequence the jobs using the SPT rule.b. Sequence the
A bank’s mortgage department must process the following six jobs to maximize client satisfaction. What sequencing rule should you use? What sequencing rule should you use? For the rule you
Describe the basic quality control practices used in manufacturing. In what service contexts can they be applied?
Develop a portfolio of advertisements from the Internet, newspapers, and magazines, and illustrate how quality is used in promoting these products.
Examine the annual reports of one company over a period of years. Summarize how quality is discussed or implied in the company’s statements and philosophy. Are any changes in the perspectives of
Conduct some research on quality practices that is focused on a particular country or global region. Summarize your findings in a two- to three-page report.
Explain how each of the Seven QC Tools would be used in the five phases of the Six Sigma DMAIC problem-solving approach. For example, in which phase(s) (define, measure, analyze, improve, or control)
Given the cost elements in the table below, determine the total percentage in each of the four major quality-cost categories. Cost Element Incoming test and inspection Scrap Quality
Leatherlike Manufacturing Company makes an artificial leather-like product for the fashion accessory market. The material is made in sheets and has the appearance of a thin rug. Each sheet is 36
Wellplace Insurance Company processes insurance policy applications in batches of 50. One day, they had 10 batches to process and, after inspection, it was found that four batches had nonconforming
Analyze the cost data below. What implications do these data suggest to managers? A $537,280 42% 45% 12% 1% Note: Figures represent percentages of quality costs by product. Total sales External
Classify the cost elements shown below for the Impressive Printing Company into the proper quality cost categories and find the total quality cost by category and percentage of total quality cost by
Use the Excel Pareto template to investigate the quality losses in a paper mill shown below. What conclusions do you reach? Category Downtime Testing costs Rejected paper Odd lot Annual Loss
The worldwide rate of baggage mishandling reported by SITA (Société Internationale de Télécommunications Aéronautiques) in 2017 was 5.73 per 1,000 passengers. If the average number of checked
A bank has set a standard that mortgage applications be processed within eight days of filing. If, out of a sample of 1000 applications, 75 fail to meet this requirement, what is the epmo metric and
Data showing the number of What is quality control? Why is it necessary in any organization?
Explain the three components of any control system and provide an example different from the text.
What is the 1:10:100 Rule? Why is it important for managers to understand?
How does quality control in services involving customer contact differ from typical manufacturing practices?
How can customer satisfaction measurement provide useful information for control in services?
What do we mean when we say that a process is “in control” or “out of control”?
What is statistical process control?
What is a control chart and what benefits can control charts provide?
Explain the difference between a discrete and a continuous metric. Provide some examples different from those in the text.
Describe the various types of control charts and their applications.
Discuss how to interpret control charts. What types of patterns indicate a lack of control?
Explain how to determine the appropriate sample size and sampling frequency for SPC.
Consider the following data showing the number of errors per thousand lines of code for a software development project. Find the control limits for a c-chart for monitoring errors per thousand lines
What is process capability and why is it important to understand?
What is the purpose of a process capability study?
What is a process capability index? Explain how process capability indexes are computed and how to interpret the results.
Thirty samples of size 3 resulted in an overall mean of 16.51 and average range of 1.30. Compute control limits for`x- and R-charts.
Thirty samples of size 4 of the customer waiting time at a call center for a health insurance company resulted in an overall mean of 14.7 minutes and average range of 0.9 minutes. Compute the control
Twenty-five samples of 100 items each were inspected and 68 were found to be defective. Compute control limits for a p-chart.
At a pizza restaurant, a 20-week study of 30 pizzas per week found a total of 18 pizzas made improperly. Compute control limits for a p-chart.
Find control limits for a c-chart with` c = 9.
Suppose that a specification calls for LTL = 2.0 and UTL = 6.0. A sample of 100 parts found μ = 4.5 and σ = 0.5. Compute Cp, Cpl, Cpu, and Cpk. Should the manager consider any action
What is lean enterprise?
Explain the four fundamental objectives of lean operating systems
What are the benefits of adopting lean operating systems?
What are the “5Ss”? Why are they important to becoming lean?
What benefits do visual controls have for lean operating systems?
Explain the importance of short setup times in a lean environment. What approach is used to reduce setup times?i like
Define a transfer batch and single piece flow. Why are they important?
How does quality improvement support lean enterprise?
CDC Discrete Fabricators wants to produce parts in batches of 300 parts. Each part must be processed sequentially from workstation A to B to C to D.a. How many seconds is required to produce the
Does a high alpha value (say a = 2 or 3) in Equation 18.2 negate the benefits of a Kanban/JIT operating system? Explain.Equation 18.2 Takt time Available time per time period Market demand rate per
Explain the role of total productive maintenance in lean operating systems.
What is Lean Six Sigma? Why are lean and Six Sigma concepts highly complementary?
Explain the difference between push and pull systems. What advantages do pull systems have over push systems?
What is a kanban? Explain how a Kanban system operates.
Describe some of the key features of good JIT systems.
A Florida lottery machine and printer at Store #8302 operates 360 days a year. If the machine jams or breaks down, the Florida Lottery Commission loses an average of $2,000 in revenue per day.
What is the role of suppliers in JIT systems?
A plastic injection molding machine operates 348 days a year. It is the bottleneck workstation in a process that produces plastic housed wall clocks. Industrial engineers collected data on the
Define Takt time and explain why it is important?
Research and write a short paper on the impact of global supply chains on JIT.
Bracket Manufacturing uses a Kanban system for a component. Daily demand is 1000 units. Each container has a combined waiting and processing time of .85 days. If the container size is 70 and the
Tooltron Manufacturing uses a Kanban system for a component. Daily demand is 425 units. Each container has a combined waiting and processing time of 1.5 days. If the container size is 35 and the
Due to rapid changes in technology, a telecommunications manufacturer decides to produce a router using just-in-time methods. Daily demand for the router is 17 units per day. The routers are built on
An automobile transmission manufacturer is considering using a JIT approach to replenishing its stock of transmissions. Daily demand for transmission #230 is 55 transmissions per day and they are
A pillow assembly line consists of five stages arranged in series. The first workstation stuffs the pillow with filler material. The second workstation sews the pillowcase and the third stage places
Define a project and provide a non-manufacturing or non-construction example.
Discuss the three key factors of the project-planning process.
What are the four major steps in the project-planning process?
Describe the role of the project manager. What skills should he or she possess?
Identify and discuss three contributors and impediments to project success.
Describe the role of the project manager. What skills should he or she possess?
What do arcs, and nodes represent in a project network?
What information do you need to collect to conduct a basic CPM model and analysis?
Define critical path. Describe, in your own words, the procedure for finding a critical path.
Define and explain the following terms: normal time, crash time, earliest start time, earliest finish time, latest start time, and latest finish time.
Define slack time and how is it computed. How is it used in project scheduling and why is it important?
Discuss the importance of project control and monitoring.
Exhibit 19.2 lists a number of impediments to project success. How might you minimize or eliminate these impediments? EXHIBIT 19.2 Contributors and Impediments to Project Success Contributors to
Describe the logic of computing the probability of completing a project.
You are in charge of a new initial public offering (IPO) on the NASDAQ stock exchange for a major bank. You have defined the project with the following characteristics. You expect to be promoted if
Prepare a job profile for a newspaper or on-line advertisement for a project manager.
Research and write a short paper (two pages maximum) on the skills needed to be a successful project manager.
Perhaps the most well-known software for project management is Microsoft ProjectTM. Investigate its capabilities and write a short paper (2 pages maximum) that describes its features.
You have collected the information in the table below for the project you are leading on web page design and development. The times are in weeks. a. What is are the total time of this project?b.
Estimates of activity times (in weeks) for a project are as follows.Suppose that the critical path is A-D-F-H. What is the probability that the project will be completed withina. 20 weeks?b. 22
You are a marketing major and have been working at a major consumer products company for the past three years. Today, your boss walked into your office and said, “Polly, I want you to be the
The county government has decided to redo the street you live on and plans to block the street off which causes you and your neighbor's considerable inconvenience. The project has three parallel
You are in charge of the purchasing, installing, and testing a new 30-ton stamping machine for a major automobile assembly line. It stamps out metal fenders and hoods for vehicles prior to painting
You are assigned your first project and if things go well you should get promoted. The CEO is aware of this project, so you have a chance for high visibility. You want to do a good job! Your first
Use the Excel template Gantt Chart to construct an early-start Gantt chart for the computer-system installation project described in problem 39. As a project manager, where would you focus your
Use the Excel template Gantt Chart to develop a Gantt chart for the early start schedule for the wedding project in problem 36 in the Computational Problems and Exercises section. Explain and trace
You are responsible for wiring a smart 12-story building in downtown Chicago. The project network and basic information is shown in the following table. The time is in weeks. Your promotion depends
Define forecasting and explain why is it important.
Explain how to compute single moving average forecasts.
Explain how to apply simple moving average and exponential smoothing models.

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