A 25 of 20 nointeMore infoMore infoFactors for calculating three-sigma limits for the x-chart and R-chart.Size of Sample Factor for UCL and LCL(n)Factor for LCL forR-Chart (D3)Factor for UCL forObservation (days)for x-chart (A2)R-Chart (DA)Sample123456821.8803.2671811201181291431.0232.57521271231181280.7292.2828126.613512850.5772.11542194817158660.4832.0047108101014191570.4190.0761.92480.3730.1361.86490.3370.1841.816100.3080.2231.777PrintDonePrintDone The Digital Guardian Company issues policies that protect clients from downtime costs due to computer system failures. It is very important to process the policies quickly because longcycle times not only put the client at risk, they could also lose business for Digital Guardian. Management is concerned that customer service is degrading because of long cycle times,measured in days. The table contains the data from five samples, each sample consisting of eight random observations.9 Click the icon to view the table with sample data.Click the icon to view the table of factors for calculating three-sigma limits for the x-chart and R-chart.a. What is your estimate of the process average?The estimate of the process average is(Enter your response rounded to two decimal places.)

Answered: The Digital Guardian Company issues…

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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The Digital Guardian Company issues policies that protect clients from downtime costs due to computer system failures. It is very important to process the policies quickly because long cycle times not only put the client at risk, they could also lose business for Digital Guardian. Management is concerned that customer service is degrading because of long cycle times, measured in days. The table contains the data from five samples, each sample consisting of eight random observations. E Click the icon to view the table with sample data. Click the icon to view the table of factors for calculating three-sigma limits for the x-chart and R-chart. a. What is your estimate of the process average? The estimate of the process average is 10.43. (Enter your response rounded to two decimal places.) b. What is your estimate of the average range? The estimate of the average range is . (Enter your response rounded to two decimal places.)
Checkout time at a supermarket is monitored using a mean and a range chart. Six samples of n = 20 observations have been obtained and the sample means and ranges computed: Sample Mean Range 1 3.06 .42 2 3.15 .50 3 3.11 .41 4 3.13 .46 5 3.06 .46 6 3.09 .45 Using the factors in Table 10.3 , determine upper and lower limits for mean and range charts. Is the process in control?
4) Because a telephone customer service center has experienced several problems, it has begun to analyze the data from customer complaints. The first step was to construct the following table. Use this data to build a Pareto chart to help identify the "vital few" problems. Process Failure Total Failures Person not available Incorrect information given Phone line busy Long delay Phone tree confusing People unfriendly 12 39 20 17 DFocus e
Why is it important to prove that a process is proven capable before developing statistical control limits (i.e., SPC charts)?
From the list below of the data being collected, identify which data would be appropriate for a P chart: Select ALL correct answers. Fluid ounces in a bottle of detergent Temperature of the fryer oil at the Lay's potato chip plant Number of articles with mistakes per every 100 sampled at a newspaper Percentage of flights that were not on-time for an airline Pizzas not made to order for a local pizzeria Weight of a bag of chips. Density of a golf ball Percentage of patients that had a medication error during their hospital stay
Inter-State Moving and Storage Company wishes to establish a control chart to monitor the proportion of residential moves that result in written complaints due to late delivery, lost items, or damaged items. A sample of 40 moves is selected for each of the last 12 months. The number of written complaints in each sample is 9, 7, 4, 9, 1, 9, 11, 5, 5, 8, 7, and 15. Number Defective Percent defective 9 18 7 14 4 8 9 18 1 2 9 18 11 22 5 10 5 10 8 16 7 14 15 30 a. Insert the mean proportion defective, UCL, and LCL. (Leave no cells blank - be certain to enter "0" wherever required. Round your intermediate calculations and final answers to 2 decimal places.) Mean proportion defective UCL LCL c. Does it appear that the number of complaints is out of control for any of the months?multiple choice Yes No
Why is order of observation important in process control?
When most processes are sampled for control chart purposes, why aren't they in statistical control?
Houston North Hospital is trying to improve its image by providing a positive experience for its patients and their relatives. Part of the "image" program involves providing tasty, inviting patient meals that are also healthful. A questionnaire accompanies each meal served, asking the patient, among other things, whether he or she is satisfied or unsatisfied with the meal. A 50-patient sample of the survey results over the past 7 days yielded the following data: Day No. of Unsatisfied Patients Sample Size 1 26 50 2 20 50 3 10 50 4 15 50 5 12 50 6 26 50 7 15 50 The control limits to include 99.73% of the random variation in meal satisfaction are: UCLp= (enter your response as a number between 0 and 1, rounded to three decimal places). LCLp = (enter your response as a number between 0 and 1, rounded to three decimal places).…
Use the DMAIC steps to describe and improve the process of ordering a book from an Internet retailer. From the perspective of the retailer, what would be done in each of the steps?
Describe a situation where it would be useful to use data validation in a table.
The Minnow County Highway Safety Department monitors accidents at the intersection of Routes 123and 14. Accidents at the intersection have averaged three per month.a. Which type of control chart should be used? Construct a control chart with three-sigma controllimits.b. Last month, seven accidents occurred at the intersection. Is this sufficient evidence to justify aclaim that something has changed at the intersection?

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