4. Problem 8.29 The number of imperfections in bond paper produced by a paper mill isobserved over a period of several days. Table 8-28 shows the area inspected and thenumber of imperfections for 25 samples. Construct a control chart for the number ofimperfections per square meter. Revise the limits, if necessary, assuming special causes forthe out-of-control points.TABLE 8-28AreaAreaSampleInspected (m?)ImperfectionsSampleInspected (m²)Imperfections115061430082100815300123200516200641504171504250101820076.1001119150147150201004820052110089300102220010250102330012111002425071220042520051325012

Answered: Problem 8.29 The number of…

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter2: Introduction To Spreadsheet Modeling

Section: Chapter Questions

Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...

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Vilfredo Pareto was a famous engineer/economist in the 19th and early 20th centuries. He reportedly expressed this 80/20 Rule: 80% of all progress results from 20% of the actions taken. The Pareto Diagram, also called a Juran Diagram, depicts a variant 80/20 Rule: 80% of all production problems come from 20% of the problem areas. a. What kind of statistical chart is the Pareto Diagram? ____ (enter H for histogram, P for probability distribution, T for a Taguchi chart, A for all three of these. N for none of these. b. The value of the Pareto Diagram is its highlighting the areas causing 80% of quality problems. ____ (enter T for true or F for false)
A company is in the business of making souvenir spoons to customer order. The customers select the size of the spoons and may specify the design to beembossed on them. One or more spoons may be ordered. The company is considering going into the make-to-stock spoon business for souvenir spoons and everyday tableware as well. What will it have to do differently How is the business likely to change?
San Angelo Manufacturing Company was concerned about a growing number of defective units being produced. At one time, the company had the percentage of defective units down to less than five per thousand, but recently rates of defects have been near, or even above, 1%. The company decided to graph its defects for the last 8 weeks (40 working days), beginning Monday, September 1 through Friday, October 24. The graph is as attached Identify two important trends evident in the quality-control chart. What might management of San Angelo do to deal with each trend?
Problem 10-7 (Algo) The postmaster of a small western town receives a certain number of complaints each day about mail delivery. DAY 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Number of complaints 4 12 16 8 9 6 5 13 14 7 6 4 2 10 Click here for the Excel Data File a. Determine three-sigma control limits using the above data. (Round your intermediate calculations to 4 decimal places and final answers to 3 decimal places. Leave no cells blank - be certain to enter "0" wherever required. Round up any negative control limit value to zero.) b. Is the process in control? multiple choice Yes No
Compute the following using customer satisfaction data from the table below.2.1 Mean Squared Error (MSE)2.2 Mean Absolute Deviation (MAD) 2.3 Mean Absolute Percentage error (MAPE)
Garcia’s Garage desires to create some colorful charts and graphs to illustrate how reliably its mechanics “get under the hood and fix the problem.” The historic average for the proportion of customers that return for the same repair within the 30-day warranty period is 0.10. Each month,Garcia tracks 100 customers to see whether they return for warranty repairs. The results are plotted as a proportion to report progress toward the goal. If the control limits are to be set at two standard deviations on either side of the goal, determine the control limits for this chart. In March, 8 of the 100 customers in the sample group returned for warranty repairs. Is the repair process in control?
Th ree ice-cream packing machines at the Creamy TreatCompany are being evaluated for their capability. Th e followingdata are recorded: Packing Machine Standard Deviation A 0.2 B 0.3 C 0.05 If specifi cations are set between 15.8 and 16.2 ounces,determine which of the machines are capable of producing withinspecifi cations
Case study Training at Hailey’s Construction Shobana, Hailey’s Construction, Sales Manager, read the memo she has just received from Kavelan , the Training Manager, and said to herself,” No way! I’m not going to let Kavelan get away with this. Last month, hhe insisted that 15 of the salespeople spend three days on a course on Quality Control conducted by a trainer. I had my hesitations, but I sent them anyway. On their return, they grumbled constantly about what a bore it was and how their time had been wasted because the content was totally irrelevant to their jobs. Now Kavelan wants another 10 participants. Well, he can just find them somewhere else!” Question 2 Elaborate what should the Training Manager do to ensure that the managers of every department willingly send their staff for the training programmes. include example also
Case Study Training at Hailey’s Construction Shobana, Hailey’s Construction, Sales Manager, read the memo she has just received from Kavelan , the Training Manager, and said to herself,” No way! I’m not going to let Kavelan get away with this. Last month, hhe insisted that 15 of the salespeople spend three days on a course on Quality Control conducted by a trainer. I had my hesitations, but I sent them anyway. On their return, they grumbled constantly about what a bore it was and how their time had been wasted because the content was totally irrelevant to their jobs. Now Kavelan wants another 10 participants. Well, he can just find them somewhere else!” Question 1 Describe the mistakes Hailey’s Construction Training Manager made
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Garcia's Garage desires to create some colorful charts and graphs to illustrate how reliably its mechanics "get under the hood and fix the problem." The historic average for the proportion of customers that return for the same repair within the 30-day warranty period is 0.09. each month, Garcia track 80 customers to see whether they return for warranty repairs. The results are plotted as a proportion to report progress toward the goal. If the control limits are to be set at two standard deviations on either side of the goal, determine the control limits for this chart. In March, 14 of the 80 customers in the sample group returned for warranty repairs. Is the repair process in control? The UCL Subscript p equals and the LCL Subscript p equals (Enter your responses rounded to three decimal places.)
Garcia's Garage desires to create some colorful charts and graphs to illustrate how reliably its mechanics "get under the hood and fix the problem." The historic average for the proportion of customers that return for the same repair within the 30-day warranty period is 0.08. Each month, Garcia tracks 100 customers to see whether they return for warranty repairs. The results are plotted as a proportion to report progress toward the goal. If the control limits are to be set at two standard deviations on either side of the goal, determine the control limits for this chart. In March, 15 of the 100 customers in the sample group returned for warranty repairs. Is the repair process in control? The UCLp equals____________The LCLp equals_____________ (Enteryour responses rounded to three decimal places.)

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