Chapter 9 questions – 327

  

Read Chapter 9 (Schoeder, R.G., Goldstein, S.M., & Rungtusanatham, M.J. (2013). Operations Management in the Supply Chain: Decisions and Cases (6th Ed). McGraw-Hill Irwin, New York, NY ISBN: 978-0-07-352524-2) and create a Microsoft Word document with your responses to the following questions.

Q1: Golden Gopher Airline issues thousands of aircraft boarding passes to passengers each day. In some cases, a boarding pass is spoiled for various reasons and discarded by the airline agent before the final boarding pass is issued to a customer. To control the process for issuing boarding passes, the airline has sampled the process for 100 days and determined the average proportion of defective passes is .006 (6 in every 1000 passes are spoiled and discarded). In the future, the airline plans to take a sample of 500 passes that are issued each day and calculate the proportion of spoiled passes in that sample for control chart purposes.

 

  • A. What is the sample size (n) for this problem? Is it 100, 500, or 1000? Explain the significance of the 100 days used to determine the average proportion defective. 
  • B. Calculate the CL, UCL, and LCL, using three standard deviations for control purposes.

Q2: We have taken 12 samples of 400 letters each from a typing pool and found the following proportions of defective letters: .01, .02, .02, .00, .01, .03, .02, .01, .00, .04, .03, and .02. A letter is considered defective when one or more errors are detected.
 

  • A. Calculate the control limits for a p control chart. 
  • B. A sample of 400 has just been taken, and 6 letters were found to be defective. Is the process still in control?  

 Q3: Each day 500 inventory control records are cycle-counted for errors. These counts have been made over a period of 20 days and have resulted in the following proportion of records found in error each day:
.0025, .0075, .0050, .0150, .0125, .0100, .0050, .0025, .0175, .0200, .0150, .0050, .0150, .0125, .0075, .0150, .0250, .0125, .0075, .0100
 

  • A. Calculate the center line, upper control limit, and lower control limit for a p control chart. 
  • B. Plot the 20 points on the chart and determine which ones are in control. 
  • C. Is the process stable enough to begin using these data for quality control purposes? 
  • PLEASE NOTE: USE THE ATTACHED EXCEL SPREADSHEET TEMPLATE TO CALCULATE THESE

(https://www.youtube.com/watch?v=zSSbsynjfis&feature=youtu.be)

 Q9: The Robin Hood Bank has noticed an apparent recent decline in the daily demand deposits. The average daily demand deposit balance has been running at $109 million with an average range of $15 million over the past year. The demand deposits for the past six days have been 110, 102, 96, 87, 115, and 106.
 

  • A. What are the CL, UCL, and LCL for the x and R charts based on a sample size of 6?
  • B. Compute an average and range for the past six days. Do the figures for the past six days suggest a change in the average or range from the past year? 

Q11: PLEASE NOTE: USE THE ATTACHED EXCEL SPREADSHEET TEMPLATE TO CALCULATE THESE: 

(https://www.youtube.com/watch?v=COO7xOXctWw&feature=youtu.be)

As cereal boxes are filled in a factory; they are weighed for their contents by an automatic scale. The target value is to put 10 ounces of cereal in each box. Twenty samples of three boxes each have been weighed for quality control purposes. The fill weight for each box is shown below.

a. Calculate the center line and control limits for the x and R charts from these data.

b. Plot each of the 20 samples on the x and R control charts and determine which samples are out of control. 

c. Do you think the process is stable enough to begin to use these data as a basis for calculating 

 x and R and to begin to take periodic samples of 3 for quality control purposes?

Get 20% Discount on This Paper
Pages (550 words)
Approximate price: -

Try it now!

Get 20% Discount on This Paper

We'll send you the first draft for approval by at
Total price:
$0.00

How it works?

Follow these simple steps to get your paper done

Place your order

Fill in the order form and provide all details of your assignment.

Proceed with the payment

Choose the payment system that suits you most.

Receive the final file

Once your paper is ready, we will email it to you.

Our Services

Custom Writings Help is a Quality-Oriented Company in Online Writing as a result of hiring exceptional professionals to execute clients' tasks.

Essays

Research Papers

At Custom Writings Help,We understand the struggle of research paper writing, and that is why at Custom WritingS Help, we are all out to help you. We pride ourselves on having a team of clinical writers. The stringent and rigorous vetting process ensures that only the 'BEST' Writers are chosen for the job. We have highly qualified Ph.D. and MA writers working with us; we equally offer these experienced writers specific bonuses and incentives to make them deliver highly original, unique, and informative content at reasonably low prices.

Admissions

Thesis Writing Service

Worlwide, Many Masters Students are struggling with Thesis Completion. A thesis is likely to be the longest and most challenging piece of work a student has ever completed. However, unlike essays and other assignments, a student can pick a particular interest topic and work on their initiative. Fortunately, we are there for you. At Custom Writings Help, you are assured of an authentic, imaginative, informative, linguistically great, and advantageous thesis that adheres to all your needs. So, why continue considering different writers when you have discovered the best in the field?

Editing

Custom Papers

Not a single student can avoid writing custom papers. However, a total lack of experience, skills, and time makes it very hard to produce a superb writing piece. Therefore, if you are seeking professional help, turn to us. Our specialized and experienced writers compose a variety of model papers, including custom essays, college term papers, research papers, book reports, MBA essays, executive summaries, dissertations, Ph.D. theses, admission essays, and research proposals for college and university students at any level.

Coursework

Essay Writing

Most of the students disregard the critical principles of essay writing and compose papers below sensible guidelines. Therefore, with Custom Writings Help, one should not worry about his/her essay. Our Writers compose informative and engaging content on all complexities and topics. We write meaningful and smart essays while prioritizing all aspects that bring about a good grade, such as impeccable grammar, proper structure, zero-plagiarism, and conformance to guidelines.

Coursework

Coourse Work Writing

Don't let the seemingly never-ending onslaught of writing assignments get you down. If you are looking where to get course work assistance online, the writers at Custom Writings Help are here to assist you with all of your writing needs. We undertake to unique delivery of papers that meet the professor's requirements. The content is proofread, edited, and checked plagiarism before submission to customers. No matter how big or small your work is, we will deliver on time. Try US Now! !

Coursework

Dissertation Writing Service

High-Quality Dissertation Writing Services are rare. They require Ph.D. academicians – not easily found. However, are an exception. The years, time, and resources we have invested in the dissertation world has given us a competitive advantage over others. Choose to come to Custom Writings Help; You will find perfect Ph.D. consultants who have written hundreds of dissertations theses ready to help you. Let our dissertation-writing services help you craft your dissertation, for you are assured we will give you the results.