ABC Company, a textile manufacturing company has recorded defects in their production for a month as shown in the table below. Should the company decide to solve the 3 types of defects belonging to the top 3 of defects. How much percentage of the problem are they expecting to be solved? Show complete solution Defect Freq Misprinting 55 Shade Variation 38 Uneven Dyeing 10 Drop Stitching 5 Dirt or Stains 2

ABC Company, a textile manufacturing company has recorded defects in their production for a month as shown in the table below. Should the company decide to solve the 3 types of defects belonging to the top 3 of defects. How much percentage of the problem are they expecting to be solved? Show complete solution Defect Freq Misprinting 55 Shade Variation 38 Uneven Dyeing 10 Drop Stitching 5 Dirt or Stains 2

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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In a sausage factory, quality managers are studying the compliance of the sausages with the requirements. Any sausage having pin holes, air pockets, deformation or breakage in its casings is counted as defective and total number of such defective sausages alone is noted in each shift. The following data represents the number of defective sausages in samples of 200 sausages taken from 10 shifts. Sample Defectives Percent Defective 1 40 20% 2 28 14% 3 15 8% 4 23 (a) 5 20 10% 6 21 11% 7 19 10% 8 15 8% 9 16 8% 10 17 9% Calculate the value for (a) in the table above. Calculate p-bar based on the samples above. What is the UCL and LCL for a p chart based on the data provided and a desired control level of 99.74%? Use your control limits from part b along with the data provided to draw a p-chart. Is the process in control? Why or why not? If not in control, suggest some potential reasons.
We want to determine the AOQ for an acceptance samplingplan when the quality of the incoming lots in percent defectiveis 1.5%, and then again when the incoming percent defective is 5%.T he sample size is 80 units for a lot size of 550 units. Furthermore,Pa at 1.5% defective levels is 0.95. At 5% incoming defective levels,the Pa is found to be 0.5. Determine the average outgoing qualityfor both incoming percent defective levels.
Ettlie Engineering has a new catalyst injection system for your countertop production line. Your process engineering departmenthas conducted experiments and determined that the mean is 8.01 grams with a standard deviation of .03. Your specificationsare: m = 8.0 and s = .04, which means an upper specification limit of 8.12 [ = 8.0 + 3(.04)] and a lower specification limit of7.88 [= 8.0 - 3(.04)].What is the Cpk performance of the injection system?
S Book Hint Print eferences Problem 13-2 (Algo) A metal fabricator produces connecting rods with an outer diameter that has a 1 ± 0.02 inch specification. A machine operator takes several sample measurements over time and determines the sample mean outer diameter to be 1.004 inches with a standard deviation of 0.006 inch. Calculate the process capability index for this example. (Round your answer to 3 decimal places.) Process capability index
As the supervisor in charge of shipping and receiving,you need to determine the average outgoing quality in a plantwhere the known incoming lots from your assembly line havean average defective rate of 3%. Your plan is to sample 80 unitsof every I ,000 in a lo t. The number of defects in the sample isnot to exceed 3. Such a plan provides you with a probabilityof acceptance of each lot of . 79 (79%). What is your averageoutgoing quality?
Refer to Table S6.1 - Factors for Computing Control Chart Limits (3 sigma) for this problem. Sample Size, n Mean Factor, A2 Upper Range, D4 Lower Range, D3 2 1.880 3.268 0 3 1.023 2.574 0 4 0.729 2.282 0 5 0.577 2.115 0 6 0.483 2.004 0 7 0.419 1.924 0.076 8 0.373 1.864 0.136 9 0.337 1.816 0.184 10 0.308 1.777 0.223 12 0.266 1.716 0.284 Auto pistons at Wemming Chung's plant in Shanghai are produced in a forging process, and the diameter is a critical factor that must be controlled. From sample sizes of 10 pistons produced each day, the mean and the range of this diameter have been as follows: Day Mean Bold x overbarx (mm) Range R (mm) 1 154.9154.9 4.04.0 2 151.2151.2 4.44.4 3 153.6153.6 3.93.9 4 155.5155.5 5.05.0 5 158.6158.6 4.3 a) What is the value of x? X = ____ mm b) What is the value of R? R =…
c) A process manufactures ball bearing whose diameters are normally distributed with mean 2.505cm and standard deviation 0.008cm.Specifications call for the diameter to be in the interval 2.5 ‡ 0.01 cm. estimate the proportion of the ball bearings will meet the specification?
1. From a perspective of Statistical Process Control (SPC), a six-sigma process will have which of the following attributes? a) The USL and LSL will be separated by a distance of six sigma b) The process center will be aligned with the LSL c) The number of defects produced by the process will be 0.0018 parts per million d) All of the above
Pareto analysis is used to show how common product defects can be related to each other. A) true b) fales
What is the sample t-statistic and the critical t-value? Count Design A Design B Di = Xi - X'i 1 135.20 108.40 26.80 2 203.10 190.30 12.80 3 208.20 170.20 38.00 4 141.70 109.10 32.60 5 244.30 217.80 26.50 6 164.10 172.70 -8.60 7 266.90 224.40 42.50 8 130.20 112.00 18.20 9 138.90 92.30 46.60 10 171.20 131.60 39.60 Sample mean= 180.38 152.88 27.50 Sample standard deviation= 48.29 48.43 16.60
2) The specification for a Lindemann’s stainless steel chimney liner requires a thickness of 7.1 mm ± 0.1 mm. The firm’s quality analyst determines that the liner process operates at a mean thickness of 7.13 mm with the standard deviation of the process being 0.02 mm. a) Calculate the upper and the lower limits for the stainless steel chimney liner. b) Calculate the Cpand Cpkfor this process. Hint: Cp = (Upper Specification Limit – Lower Specification Limit)/6sigma Cpk = minimum of [(Upper Specification Limit – Xbar)/3sigma], [(Xbar – Lower Specification Limit)/3sigma]
/mod/quiz/attemptphp?attempt=D1600647&cmid=815158&page=9 n (Academic) ns Management Fall20 The X-bar chart reports whether if there has been a change in the number of defective items in a sample Select one: O a. True O b. False Time left 1:2 a 0) E ch F8 F9 F10 F11 F12 F3 F4 F5 F6 F7 48 5 0 7 9 E R F HI J- K L 而