a)The value of mean fraction defective (p)=(enter your response as a fraction between 0 and 1, roundedto four decimal places).The control limits to include 99.73% of the random variation in the billing process are:UCL Subscript UCLP =(enter your response as a fraction between 0 and 1, rounded to four decimalplaces).LCLp =(enter your response as a fraction between 0 and 1, rounded to four decimalplaces).Based on the developed control limits, the number of incorrect bills processed has been OUT OFCONTROL or IN-CONTROLb) To reduce the error rate, which of the following techniques can be utilized:A. Fish-Bone ChartB. Pareto ChartC. BrainstormingD. All of the above The accounts receivable department at Rick Wing Manufacturing has been having difficulty getting customers to paythe full amount of their bills. Many customers complain that the bills are not correct and do not reflect the materials thatarrived at their receiving docks. The department has decided to implement SPC in its billing process. To set up controlcharts, 10 samples of 100 bills each were taken over a month's time and the items on the bills checked against the billof lading sent by the company's shipping department to determine the number of bills that were not correct. The resultswere:123456Sample No.78910No. of Incorrect Bills75164053692a) The value of mean fraction defective (p) = (enter your response as a fraction between 0 and 1, rounded to fourdecimal places).

Given data: Sample size =100No. of samples = 10

Answered: (enter your response as a fraction…

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 accounts receivable department at Rick Wing Manufacturing has been having difficulty getting customers to pay the full amount of their bills. Many customers complain that the bills are not correct and do not reflect the materials that arrived at their receiving docks. The department has decided to implement SPC in its billing process. To set up control charts, 10 samples of 100 bills each were taken over a month's time and the items on the bills checked against the bill of lading sent by the company's shipping department to determine the number of bills that were not correct. The results were: Sample No. 1 2 3 4 5 6 7 8 9 10 No. of Incorrect Bills 4 3 17 2 0 5 5 2 7 2 a) The value of mean fraction defective (p) = (enter your response as a fraction…
The accounts receivable department at Rick Wing Manufacturing has been having difficulty getting customers to pay the full amount of their bills. Many customers complain that the bills are not correct and do not reflect the materials that arrived at their receiving docks. The department has decided to implement SPC in its billing process. To set up control charts, 10 samples of 50 bills each were taken over a month's time and the items on the bills checked against the bill of lading sent by the company's shipping department to determine the number of bills that were not correct. The results were: Sample No. 1 2 3 4 5 6 7 8 9 10 No. of Incorrect Bills 6 5 11 4 0 5 3 4 7 2 a) The value of mean fraction defective (p) = nothing (enter your response as a fraction…
Explain the Cronbach’s Alpha measurement and its internal consistency?
The purpose of x-bar chart is a. quality assurance b. Measure production consistency c. Part of quality assurance d. to conduct Quality assurance
What are the difficulties of designing an SPI measuring system?
A. Choudhury’s bowling ball factory in Illinois makes bowling balls of adult size and weight only. The standard devia-tion in the weight of a bowling ball produced at the factory is known to be 0.12 pounds. Each day for 24 days, the averageweight, in pounds, of nine of the bowling balls produced that dayhas been assessed as follows: a) Establish a control chart for monitoring the average weights of the bowling balls in which the upper and lower control lim-its are each two standard deviations from the mean. What are the values of the control limits?b) If three standard deviations are used in the chart, how do thesevalues change? Why?
Describe a way that Waste Management could go about obtaining a simple random sample of its customers.
Designing an x -Chart Using the Process Standard DeviationThe Sunny Dale Bank monitors the time required to serve customers at the drive-through window because it is an important quality factor in competing with other banks in the city. After analyzing the data gathered in an extensive study of the window operation, bank management determined that the mean time to process a customer at the peak demand period is 5 minutes, with a standard deviation of 1.5 minutes. Management wants to monitor the mean time to process a customer by periodically using a sample size of six customers. Assume that the process variability is in statistical control. Design an x-chart that has a type I error of 5 percent. That is, set the control limits so that there is a 2.5 percent chance a sample result will fall below the LCL and a 2.5 percent chance that a sample result will fall above the UCL. After several weeks of sampling, two successive samples came in at 3.70 and 3.68 minutes, respectively. Is the…
Consider the types of poor driving habits that mightoccur at a traffic light. Make a list of the 10 you consider mostlikely to happen. Add the category of “other” to that list.a) Compose a check sheet [like that in Figure 6.6 (a)] to collectthe frequency of occurrence of these habits. Using your checksheet, visit a busy traffic light intersection at four different times of the day, with two of these times being during high-traffic periods (rush hour, lunch hour). For 15 to 20 minutes each visit, observe the frequency with which the habits youlisted occurred.b) Construct a Pareto chart showing the relative frequency ofoccurrence of each habit.
Telephone inquiries of 100 IRS “customers” aremonitored daily at random. Incidents of incorrect informationor other nonconformities (such as impoliteness to customers)are recorded. The data for last week follow:DAY NO. OF NONCONFORMITIES1 52 103 234 205 15 a) Construct a 3-standard deviation c -chart of nonconformities.b) What does the control chart tell you about the IRS telephoneoperators?
Question 2: The account receivable department of R&W Company has received complaints from manycustomers about incorrect billing, i.e., the bills do not reflect the materials that arrived at their receivingdocks. The department has decided to implement statistical process control in its billing process. Randomsamples of 60 bills each were taken over 8 days and the items on the bills checked against the bill of ladingsent by the company’s shipping department to determine the number of incorrect bills. The observationis given below: Day 1 2 3 4 5 6 7 8 No. of Incorrect Bills 3 13 5 12 9 1 3 2 a. You want to develop appropriate control chart(s) to check whether the process is in control.i. Find the control limitsii. Plot the control chart(s) in excel.b. Is the process in control? Give reason for your answer.
Boston Electric Generators has been getting manycomplaints from its major customer, Home Station, about thequality of its shipments of home generators. Daniel Shimshak,the plant manager, is alarmed that a customer is providing himwith the only information the company has on shipment quality.He decides to collect information on defective shipments througha form he has asked his drivers to complete on arrival at customers'stores. The forms for the first 279 shipments have been turnedin. They show the following over the past 8 weeks: Even though Daniel increased his capacity by adding more workersto his normal contingent of 30, he knew that for many weekshe exceeded his regular output of 30 shipments per week. Areview of his turnover over the past 8 weeks shows the following: a) Develop a scatter diagram using total number of shipmentsand…

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