3.6. One of the stages in the process of making denim cloth at theSouthern Mills Company is to spin cotton yarn onto spindles for subse-quent use in the weaving process. Occasionally the yarn breaks duringthe spinning process, and an operator ties it back together. Some num-ber of breaks is considered normal; however, too many breaks mightmean that the yarn is of poor quality. In order to monitor this process,the quality-control manager randomly selects a spinning machineeach hour and checks the number of breaks during a 15-minute period.Following is a summary of the observations for the past 20 hours:Number ofNumber ofSampleBreaksSampleBreaks1311321243413411475158.167174187.81989.206.10Construct a c-chart using 3ơ limits for this process and indicate if theprocess was out of control at any time.ohoin when orders come into3.6

Answered: 3.6. One of the stages in the process…

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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A quality inspector took five samples, each with four observations (n = 4), of the length oftime for glue to dry. The analyst computed the mean of each sample and then computed thegrand mean. All values are in minutes. Use this information to obtain three-sigma (i.e., z = 3)control limits for means of future times. It is known from previous experience that the standard deviation of the process is .02 minute.SAMPLE1 2 3 4 51 12.11 12.15 12.09 12.12 12.09Observation 2 12.10 12.12 12.09 12.10 12.143 12.11 12.10 12.11 12.08 12.134 12.08 12.11 12.15 12.10 12.12¯X 12.10 12.12 12.11 12.10 12.12
Webster Chemical Company produces mastics and caulkingfor the construction industry. The product is blended inlarge mixers and then pumped into tubes and capped.Management is concerned about whether the filling processfor tubes of caulking is in statistical control. The processshould be centered on 8 ounces per tube. Several samplesof eight tubes were taken, each tube was weighed, and theweights in Table 3.3 were obtained. a. Assume that only six samples are sufficient and developthe control charts for the mean and the range.b. Plot the observations on the control chart and commenton your findings.
1. HighQualityasavalueproposition:Paras took on himself to ensure quality becomes a top differentiator and a value proposition to its customers. They started working closely with beekeepers in the Himachali region around the Himalayan foothills and in Muzaffarpur, where they encourage ethical beekeeping. Ethical beekeeping is a format where a hundred per cent of the honey is harvested at no point. Only 60% will be taken out of the hives that, or through that process, at any point, 40% will be left back for the bees.Also, through the exploration and pursuit of pure honey, Paras came across multiflora honey, which is most commonly used as a source of honey. But unfortunately, adulteration happens when a blend of multiflora honey is packaged and sold. Paras ensured that the lab tested the source from which they collected the honey to ensure the promise of purity was kept at every stage. Moreover, while sourcing the honey, the honey twig ensured that it was entirely antibiotic-free.2.…
1. HighQualityasavalueproposition:Paras took on himself to ensure quality becomes a top differentiator and a value proposition to its customers. They started working closely with beekeepers in the Himachali region around the Himalayan foothills and in Muzaffarpur, where they encourage ethical beekeeping. Ethical beekeeping is a format where a hundred per cent of the honey is harvested at no point. Only 60% will be taken out of the hives that, or through that process, at any point, 40% will be left back for the bees.Also, through the exploration and pursuit of pure honey, Paras came across multiflora honey, which is most commonly used as a source of honey. But unfortunately, adulteration happens when a blend of multiflora honey is packaged and sold. Paras ensured that the lab tested the source from which they collected the honey to ensure the promise of purity was kept at every stage. Moreover, while sourcing the honey, the honey twig ensured that it was entirely antibiotic-free.2.…
Problem 10-5 (Algo) Using samples of 196 credit card statements, an auditor found the following:Use Table-A. Sample 1 2 3 4 Number with errors 4 3 6 9 Click here for the Excel Data File a. Determine the fraction defective in each sample. (Round your answers to 4 decimal places.) b. If the true fraction defective for this process is unknown, what is your estimate of it? (Round your answer to 1 decimal place.) c. What is your estimate of the mean and standard deviation of the sampling distribution of fractions defective for samples of this size? (Round your intermediate calculations and final answers to 4 decimal places.) d. What control limits would give an alpha risk of .03 for this process? (Round your intermediate calculations to 4 decimal places. Round your "z" value to 2 decimal places and other answers to 4 decimal places.) e. What alpha risk would control limits of .0470 and .0092 provide? (Round your intermediate calculations to 4 decimal…
8. Question content area Part 1 Refer to the table Factors for Computing Control Chart Limits (3 sigma) LOADING... for this problem. Your supervisor, Lisa Lehmann, has asked that you report on the output of a machine on the factory floor. This machine is supposed to be producing optical lenses with a mean weight of 50 grams and a range of 3.5 grams. The following table contains the data for a sample size of n=6 taken during the past 3 hours: Sample 1 2 3 4 5 6 7 8 9 10 x 55 47 49 50 52 57 55 48 51 56 R 3 1 5 3 2 6 3 2 2 3 Part 2 Set the control limits for this process for the x-chart when the machine is working properly. UCL-x = _______? grams (round to two decimal places) LCL-x = ________? grams (round to two decimal places) B) Set the control…
Question content area Part 1 Refer to Table S6.1 - Factors for Computing Control Chart Limits (3 sigma) LOADING... for this problem. Twelve samples, each containing five parts, were taken from a process that produces steel rods at Emmanual Kodzi's factory. The length of each rod in the samples was determined. The results were tabulated and sample means and ranges were computed. The results were: Sample Sample Mean (in.) Range (in.) Sample Sample Mean (in.) Range (in.) 1 12.202 0.033 7 12.203 0.041 2 12.202 0.041 8 12.205 0.034 3 12.193 0.034 9 12.193 0.027 4 12.206 0.051 10 12.203 0.029 5 12.195 0.031 11 12.203 0.039 6 12.199 0.036 12 12.204 0.047 Part 2 For the given data, the x = enter your response here inches (round your response to four…
Quality control in a factory pulls 40 parts with paint, packaging, or electronic defects from anassembly line. Of these, 28 had a paint defect, 17 had a packaging defect, 13 had an electronicdefect, 6 had both paint and packaging defects, 7 had both packaging and electronics defects, and 10had both paint and electronic defects. Did any part have all three types of defect? If so, how many?
Instruction: Prepare a check sheet to analyze the data below from customer complaints, then prepare a list of recommendations that will address these complaints. Case: Tip Top Markets Tip Top Markets is a regional chain of supermarkets located in the southeastern United States. Karen Martin, manager of one of the stores, was disturbed by the large number of complaints from customers at her store, particularly on Tuesdays, so she obtained complaint records from the store’s customer service desk for the last nine Tuesdays. June 1 out of orange yogurt produce not fresh bread stale lemon yogurt past sell date checkout lines too long couldn’t find rice overcharged milk past sell date double charged stock clerk rude meat smelled strange cashier not friendly charged for item not purchased out of maple walnut ice cream couldn’t find the sponges something green in meat meat tasted strange didn’t like music store too cold…
Q4) Ten samples of size four were taken from a process, and their weights measured. The sample averages and sample ranges are in the following table. Construct and plot an x-bar and R-chart using these data. Is the process in control? Sample Mean Range 1 20.01 0.45 2 19.98 0.67 3 20.25 0.30 4 19.90 0.30 5 20.35 0.36 6 19.23 0.49 7 20.01 0.53 8 19.98 0.40 9 20.56 0.95 10 19.97 0.79
Refer to Table S6.1 - Factors for Computing Control Chart Limits (3 sigma) LOADING... for this problem. Sampling 4 pieces of precision-cut wire (to be used in computer assembly) every hour for the past 24 hours has produced the following results: Hour x R Hour x R Hour x R Hour x R 1 3.15" 0.65" 7 3.15" 0.58" 13 3.11" 0.85" 19 4.51" 1.66" 2 3.00 1.23 8 2.65 1.13 14 2.93 1.31 20 2.89 1.04 3 3.22 1.43 9 3.02 0.66 15 3.22 1.11 21 2.55 1.08 4 3.39 1.21 10 2.85 1.28 16 2.84 0.55 22 3.28 0.41 5 3.07 1.12 11 2.73 1.12 17 2.96 1.43 23 2.84 1.63 6 2.76 0.42 12 3.07 0.45 18 2.84 1.34 24 2.64 0.92 Based on the sampling done,…
Q6 - A department store manager has monitored the number of complaints received per week about poor service. The probabilities for numbers of complaints in a week, established by this review, are shown in the table. Number of complaints 0 1 2 3 4 5Probability 0.17 0.30 0.33 0.07 0.05 0.08 What is the mean of complaints received per week? Please round your answer to the nearest hundredth.

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