Operations Management
13th Edition
ISBN: 9780135173626
Author: HEIZER, Jay, RENDER, Barry, Munson, Chuck
Publisher: Pearson,
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Chapter 10, Problem 31P
Summary Introduction
To determine: The
Introduction: Sample size is required to determine the number of observations that are necessary to find the true cycle time.
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13-2. (Pareto Chart & Fishbone Diagram). Smith, Schroeder, and Torn (SST) is a short-haul household furniture moving company. SST"s labor force, selected from the
local community college football team, is temporary and part-time. SST is concerned with recent complaints, as tabulated on the following tally sheet.
Complaint
Broken glass
Delivered to wrong address
Furniture rubbed together while on truck
Late delivery
Late arrival for pickup
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//
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Missing items
Nicks and scratches from rough handling /////
Soiled Upholstery
///// /////
Tally
///// /
///
/////
I
//
///// ///// ///// ///
a. Use a Pareto chart to identify the "few vital" complaint problems.
b. Use a cause-and-effect diagram to identify potential causes of the complaints
erations 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
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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
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Chapter 10 Solutions
Operations Management
Ch. 10 - Prob. 1DQCh. 10 - Prob. 2DQCh. 10 - Prob. 3DQCh. 10 - Prob. 4DQCh. 10 - Prob. 5DQCh. 10 - Prob. 6DQCh. 10 - Prob. 7DQCh. 10 - Prob. 8DQCh. 10 - Prob. 9DQCh. 10 - Prob. 10DQ
Ch. 10 - Prob. 11DQCh. 10 - Prob. 12DQCh. 10 - Prob. 13DQCh. 10 - Prob. 14DQCh. 10 - Prob. 2PCh. 10 - Draw an activity chart for a machine operator with...Ch. 10 - Prob. 4PCh. 10 - Prob. 5PCh. 10 - Prob. 6PCh. 10 - Prob. 1PCh. 10 - Prob. 7PCh. 10 - Prob. 8PCh. 10 - Prob. 9PCh. 10 - Prob. 10PCh. 10 - Prob. 11PCh. 10 - Prob. 12PCh. 10 - Prob. 13PCh. 10 - Prob. 14PCh. 10 - Prob. 15PCh. 10 - Prob. 16PCh. 10 - Prob. 17PCh. 10 - Prob. 18PCh. 10 - Prob. 19PCh. 10 - Prob. 20PCh. 10 - Prob. 21PCh. 10 - Prob. 22PCh. 10 - Prob. 23PCh. 10 - Prob. 24PCh. 10 - Prob. 25PCh. 10 - Prob. 26PCh. 10 - Prob. 27PCh. 10 - Prob. 28PCh. 10 - Prob. 29PCh. 10 - Prob. 30PCh. 10 - Prob. 31PCh. 10 - Prob. 32PCh. 10 - Prob. 34PCh. 10 - Prob. 35PCh. 10 - Prob. 36PCh. 10 - Prob. 37PCh. 10 - Prob. 33PCh. 10 - Prob. 39PCh. 10 - Prob. 40PCh. 10 - Prob. 41PCh. 10 - Prob. 42PCh. 10 - Prob. 44PCh. 10 - Prob. 1CSCh. 10 - Prob. 2CSCh. 10 - Prob. 3CSCh. 10 - Prob. 4CSCh. 10 - Prob. 2.1VCCh. 10 - Prob. 2.2VCCh. 10 - Prob. 2.3VCCh. 10 - Prob. 2.4VCCh. 10 - Prob. 1.1VCCh. 10 - Prob. 1.2VCCh. 10 - Prob. 1.3VC
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- K 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_forwardQuestion 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_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
- Questionnaire design and questions to be asked in thesis " Evaluating the anti-money laundering mechanism in the banking sector from a customer's perspective".arrow_forward8. A teller at a drive-up window at a bank had the following service times (in minutes) for 20 randomly selected customers: SAMPLE 1 2 3 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 Select a chart to monitor the central tendency of the process, what are the 3-sigma control limits using a mean chart? Keep 3 decimal places. Select one: a. LCL = 4.212, UCL = 4.788 b. LCL = 4.414, UCL = 4.586 c. LCL = 4.245, UCL = 4.755 d. None of the other options. e. LCL = 4.385, UCL = 4.615arrow_forwardA time study has revealed an average observed timeof 5 minutes, with a standard deviation of 1.25 minu tes. Thesefigures are based on a sample of 75 cycles. Is this sample largeenough for analyst Anand Paul to be 99.73% confident that thestandard time is within 5% of the true value?arrow_forward
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