3-11. Valtec Electronics fills orders for its electronic componentsand parts by truck to customers through several distributioncenters. A measure of its supply chain responsiveness isorder fulfillment lead time, which is the number of daysfrom when a company receives an order to when it is deliv-ered to the customer. A distribution center manager hastaken 20 samples of 5 orders each during the month andrecorded the lead time for each as follows:SamplesLoad Time (Days)11.32.40.73.01.82.11.21.02.53.64.23.32.61.53.041.62.12.80.91.52.63.01.44.61.90.82.75.83.74.572.63.53.13.61.48.3.43.16.11.52.52.82.52.22.91.8102.44.85.93.24.4111.92.73.42.20.4126.14.92.13.65.2131.23.42.82.34.5142.42.93.42.32.5 Samples15Load Time (Days)3.77.01.42.43.3163.62.74.82.01.7170.45.31.86.53.24.8182.93.44.84.4192.73.62.95.21.84.1204.72.02.03.1

Concepts and reason Control charts: Control chart is a graph that depicts the change of…

Answered: Valtec Electronics fills orders for its…

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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Please no written by hand solutions In a recent commercial, a weight-loss company featured testimonials touting their “miracle shake” nutritional supplement. Satisfied Customer Time (days) Weight loss (kg) Sarah, from Toronto 30 11 Zack, from New York 45 16 Eli, from Detroit 90 36 Yvette, from Montreal 10 4.5 Lynn, from San Diego 30 8.5 Kulwinder, from Vancouver 60 20 The commercial claims that the miracle shake will provide guaranteed weight loss. a) Use this data to determine the correlation between time on the diet and weight loss (either the Spearman's Rank Coefficient, or the PPMCC, but state which you are calculating. You are welcome to use a spreadsheet). b) Does the correlation imply that the miracle shakes cause weight loss? Identify any possible outliers.
South Africa Airways would like to monitor its airline’s performance. Each week for the past 20 weeks, they checked each week a random sample of 100 flight arrivals for “one-time” performance. The table that follows contains the number of flights that did not meet South Africa Airways definition of “one time”: Week Late flights 1 2 2 4 3 10 4 4 5 1 6 1 7 13 8 9 9 11 10 0 11 3 12 4 13 2 14 2 15 8 16 2 17 3 18 7 19 3 20 2 Calculate the upper and lower control limits for this chart.
3.5. The Great North Woods Clothing Company is a mail-order company that processes thousands of mail and telephone orders each week. It has a customer service number to handle customer order problems, inquiries, and complaints. The company wants to monitor the number of customer calls that can be classified as complaints. The total number of complaint calls the customer service department has received for each of the last 30 weekdays is shown as follows Day Complaint Calls Day Complaint Calls 1 27 16 19 2 15 17 12 3 38 18 17 4 41 19 18 5 19 20 26 6 23 21 31 7 21 22 14 8…
Management of Mittel Rhein AG of Köln, Germany, would like to reduce the amount of time between when a customer places an order and when the order is shipped. For the first quarter of operations during the current year the following data were reported: Inspection time- 0.7 daysWait time (from order to start of production) -16.6 daysProcess time -2.7 daysMove time -1.3 daysQueue time- 4.5 daysRequired:1. Compute the throughput time. (Round your answer to 1 decimal place.) 2. Compute the manufacturing cycle efficiency (MCE) for the quarter. (Round your answer to the nearest whole percentage (i.e., 0.12 should be entered as 12).) 3. What percentage of the throughput time was spent in non–value-added activities? (Round your answer to the nearest whole percentage (i.e., 0.12 should be entered as 12).) 4. Compute the delivery cycle time. (Round your intermediate calculations and final answer to 1 decimal place.) 5. If by using Lean Production all queue…
Employees at Precision Engine Parts Company produce parts according to exact design specifications. The employees are paid according to a piece-rate system, wherein the faster they work and the more parts they produce, the greater their chances for monthly bonuses. Management suspects that this method of pay may contribute to an increased number of defective parts. A specific part requires a normal, standard time of 23 minutes to produce. The quality control manager has checked the actual average times to produce this part for 10 different employees during 20 days selected at random during the past month and determined the corresponding percentage of defective parts, as follows: Develop a linear regression model relating average production time to percentage defects to determine whether a relationship exists and the percentage of defective items that would be expected with a normal production time of 23 minutes.
5. Elton Mayo is best associated with the Hawthorne studies which were conducted at the Hawthorn plant of Western Electric in Cicero, Illinois?a. TRUE b. FALSE6. By definition, an objective deal with achieving a measurable result with due regard to time.a.True b. False
Given the attached data. Answer the following questions for a 7 period moving average. t At 1 5477 2 3338 3 4799 4 2852 5 6332 6 8385 7 4382 8 4184 9 14229 10 10385 11 11676 12 5271 13 8938 14 9279 15 13990 16 2890 17 13027 18 8970 19 6700 20 7065 21 12491 22 8748 23 8396 24 6102 25 7559 26 7997 27 11981 28 10680 29 5783 30 2501 31 7620 32 10194 33 7908 34 11985 35 5863 36 3024 37 8758 38 1640 39 6569 40 11728 41 6659 42 2830 43 10018 44 8448 45 12409 46 2083 47 6374 48 7438 49 4576 50 4795 MAD = Average(|A-F|) TS =SUM(A-F)/MAD MSE = Average(A-F)2 1. Compute your forecast for period 51. The potential answers are: A: 11221.6 units. B: 12461 units. C: 8020.83 units. D: 4414 units. E: 6589 units.
The operations manager of a Soft drink company is concerned about Machine No.3 in the assembly line. In order to make sure that the machine is operating correctly, samples are taken, and the average and range for each sample is computed. Each sample consists of 10 items produced from that machine. Recently, 12 samples were taken and the sample range and average computed for each are as follows: Sample Number Sample Range Sample Mean 1 1.00 45 2 1.21 44 3 0.81 45 4 1.00 46 5 1.11 47 6 0.72 46 7 0.76 49 8 1.01 48 9 1.02 50 10 0.89 51 11 0.76 49 12 1.10 51 During installation, the supplier set an average of 46 for the process with an average range 0.9. (a) Draw the appropriate control charts for machine No. 3. (b) Comment on your results.
Mr. Aaron is studying the effects of two innovative instructional strategies on student achievement. He randomly selected 60 students from the 1,512 students in his community college to participate in the study. These 60 students are most appropriately known as the___________________. Select one: a. target population b. research group c. sample d. accessible population
There is only one payroll training tax in North America. The Quebec government program that forces employers to spend 1 percent of payroll on training may not have the intended consequences of increasing training investments in employees. Using data from a Statistics Canada survey, Alan Saks of the University of Toronto and Robert Haccoun of the Université de Montréal matched Quebec employers with Ontario employers and found that there were no differences in amounts spent on training. The paperwork is so cumbersome that many employers prefer to pay the 1 percent tax rather than go through the thick guidebooks necessary to report the training. There are many other mandatory training programs across Canada. In addition to legal requirements in posting information on employment standards, occupational health and safety, accessibility, pay equity plans, workplace violence policies, among others, legislation require organizations to have formal training programs in place. This includes…
Naïve method versus three period Moving Average The number of major plumbing repair jobs performed by Augur’s Plumbing Service in each of the last six months is listed below. Month Jobs October 92 November 94 December 98 January 95 February 99 March 104 Use the ‘textbook’ naïve method to forecast April jobs (Ft+1 = Xt + (Xt – Xt-1). Use the three- period moving average to forecast jobs in April Based upon the MAD (mean absolute deviation), determine whether the three-period moving average or textbook naïve method is more accurate, based upon forecasts for January through March.
Estimating a cost function, high-low method. Lacy Dallas is examining customer-service costs in the southern region of Camilla Products. Camilla Products has more than 200 separate electrical products that are sold with a 6-month guarantee of full repair or replacement with a new product. When a product is returned by a customer, a service report is prepared. This service report includes details of the problem and the time and cost of resolving the problem. Weekly data for the most recent 8-week period are as follows: Plot the relationship between customer-service costs and number of service reports. Is the relationship economically plausible? Use the high-low method to compute the cost function relating customer-service costs to the number of service reports. What variables, in addition to number of service reports, might be cost drivers of weekly customer-service costs of Camilla Products?

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