a)
To determine: The percentage spent in working, through observation
Introduction:
b)
To determine: The required sample size
Introduction: Sample size is required to determine the number of observations that are necessary to find the true cycle time.
c)
To determine: Whether the sample size taken by the assistant is adequate or not
Introduction: Sample size refers to the number of observations that are necessary to determine the cycle time. The major goal of sample size is to determine inferences about the population from the observations.
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Operations Management: Sustainability and Supply Chain Management (12th Edition)
- Question 3 A coffee producer wishes to produce new 50-gram pack for people who like to bring their own coffee when they travel. The producer asked your help to monitor the quality of the process by setting up the appropriate control charts. Based on the data shown in the table, is the process in control? Sample 2 3 4 5 6 7 8 9 2 3 4 Values for A2, D3 and D4 Sample Size n 10 1 54.5 50.6 51.1 52.7 51.7 5 6 7 8 9 10 11 51.1 54.0 53.2 51.9 A2 D3 1.88 0 1.02 0 0.73 0 0.58 0 0.48 0 0.42 0.08 0.37 0.14 0.34 0.18 0.31 0.22 0.29 0.26 12 0.27 0.28 Show all your workings clearly. 2 54.3 53.5 54.3 52.1 51.2 Observation 51.5 52.3 50.4 50.2 D4 3.27 2.57 2.28 2.11 2.00 1.92 1.86 1.82 1.78 1.74 1.72 3 53.8 53.2 50.4 51.3 54.7 54.7 54.7 53.4 50.2 4 50.4 54.9 50.7 51.0 54.3 50.4 51.4 51.4 52.9arrow_forwardsubject: quality control What evidence is there that Six Sigma has been implemented in how many organizations in the world?arrow_forwardFour samples of three observations each have been taken. Sample 1: 12.3, 12, 12.1. Sample 2: 11.9, 12, 12.7. Sample 3: 12, 12.2, 11.8. Sample 4: 11.9, 11.8, 11.8. LCL and UCL of X-bar chart are: O a. None of them Ob. 11.74 and 12.36 O C. 3.23 and 3.56 d. 12.00 and 13.24 O e. 11.63 and 12.45arrow_forward
- Time left 1:06:0- In a fabric manufacturing factory, the quality control process using control charts from SPC. In an hour there are a total of 5 samples are taken each having 4 observations regarding the thickness of fabric in measured in millimeters. In a particular hour, the sample means (X-bar) are noted to be: 156.46, 199.62, 189.31, 102.22, and112.09 respectively. In the same sample, the corresponding ranges are: 11.97, 12.17, 13.94, 11.86, and 11.83 respectively. What are the lower and upper control limits for the R chart? O a. 0,28.17 O b. 0,31.17 OC None is correct O d. 0,24.71 O e. 0,30.47 Of. 0,29.17 US PAGE NEXT PAGE O # C a pe here to search Prt F10 F12 %23 & 2 . 3 5 6 V. 8. R T. Y U P 41 S F J G y H K L / C V } BYN i 10 Alt Alt Ctrlarrow_forwardQUESTION 6 A Taguchi loss determination: A component has a target dimension value of 50 mm. It is considered a complete loss of $23 if the deviation exceeds +/- 1.5 mm. Determine the loss if a component measures 20.2 mm. Round your answer to the nearest penny, if applicable. QUESTION 7 A business process has the following parameters: Process mean: 90 Upper Specification Limit 100 Lower Specification Limit 80 Process Standard Deviation: 3.25 Determine the process Capability Ratio Round your answer to 3 decimal places, if applicable.arrow_forwarderations Management Spring21 Time left 1:09:19 stion In a fabric manufacturing factory, the quality control process using control charts from SPC. In an hour there are a total of 5 samples are taken each having 5 observations regarding the thickness of fabric in measured in millimeters. In a particular hour, the sample means (X-bar) are noted to be: 156.46, 199.62, 189.31, 102.22, and112.09 respectively. In the same sample, the corresponding ranges are: 11.97, 12.17, 13.94, 11.86, and 11.83 respectively. What are the lower and upper control limits for the X-bar chart? et ered ed out of O a. None is correct lag O b. 156.55, 170.47 tion O C. 144.77, 159.11 O d. 145.40, 190.72 O e. 143.55, 165.47 Of. 142.92, 160.66 Fi PREVIOUS PAGE NEXT PAGE O Type here to search %23arrow_forward
- What is the answer of this question ?arrow_forwardGive typed full explanationarrow_forwardsubject : quality control topic: six sigma The increased global manufacturing competition forces many organizations to adapt quality tools and techniques in order to survive in the modern marketplace. Find and choose a real case study of the organization of your own choice (such as healthcare, IT-industry, automobile, chemical etc.) and critically analyzed how these organization reduced their product defects and reduced cost using six sigma methodology.arrow_forward
- Four samples of three observations each have been taken, with actualmeasurements (in centimeters) shown below. Construct x bar and R charts, and determine ifthe production process is under control. Samples 1 2 3 4 12.3 11.9 12.0 12.1 12.2 12.2 12.2 11.8 12.1 12.2 11.8 11.8arrow_forwardK Claudine Soosay recorded the following times assembling a watch: Observation No. 1234567co 8 Time (minutes) 0.12 0.10 0.11 0.11 0.15 0.10 0.10 0.10 Observation No. 9 10 11 12 13 14 15 16 Time (minutes) 0.11 0.08 0.11 0.10 0.10 0.11 0.14 0.08arrow_forward20. A teller at a drive-up window at a bank had the following service times (in minutes) for 20 randomly Chapter Ten Quality Control selected customers. SAMPLE 1 4. 4.5 4.6 4.5 4.7 4.2 4.5 4.6 4.6 4.2 4.4 4.4 4.8 4.3 4.7 4.4 4.5 4.3 4.3 4.6 4.9 a. Determine the mean of each sample. b. If the process parameters are unknown, estimate its mean and standard deviation. c. Estimate the mean and standard deviation of the sampling distribution. d. What would three-sigma control limits for the process be? What alpha risk would they provide? e. What alpha risk would control limits of 4.14 and 4.86 provide? f. Using limits of 4.14 and 4.86, are any sample means beyond the control limits? If so, which one(s)? g. Construct control limits? If so, which one(s)? ontrol charts for means and ranges using Table 10.3. Are any samples beyond the h. Explain why the control limits are different for means in parts d and g. i. If the process has a known mean of 4.4 and a known standard deviation of .18, what…arrow_forward
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