Principles Of Operations Management
11th Edition
ISBN: 9780135173930
Author: RENDER, Barry, HEIZER, Jay, Munson, Chuck
Publisher: Pearson,
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Chapter 10, Problem 39P
Summary Introduction
To calculate: The average cycle time.
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what are the disadvantages of using work sampling to develop time standards for standard, repetitive operations?
Management of Mittel Rhein AG of Köln, Germany, would like to reduce the amount of time between when a customer places an order and when the order is shipped. For the first quarter of operations during the current year the following data were reported:
Inspection time- 0.7 daysWait time (from order to start of production) -16.6 daysProcess time -2.7 daysMove time -1.3 daysQueue time- 4.5 daysRequired:1. Compute the throughput time. (Round your answer to 1 decimal place.)
2. Compute the manufacturing cycle efficiency (MCE) for the quarter. (Round your answer to the nearest whole percentage (i.e., 0.12 should be entered as 12).)
3. What percentage of the throughput time was spent in non–value-added activities? (Round your answer to the nearest whole percentage (i.e., 0.12 should be entered as 12).)
4. Compute the delivery cycle time. (Round your intermediate calculations and final answer to 1 decimal place.)
5. If by using Lean Production all queue…
How reliable is the result of work sampling activity in determining working time and idle time of the operator?
Chapter 10 Solutions
Principles Of Operations Management
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- Prepare a run diagram for this emergency call data. Use five-minute intervals (i.e., count the calls received in each five-minute interval. Use intervals of 0 to 4, 5 to 9, etc.). Note: Two or more calls may occur in the same minute; there were three operators on duty this night. What can you conclude from the run chart?arrow_forwardA Methods and Measurements Analyst needs to develop a time standard for a certain task. The task involves use of a ruler, square, and portable electric saw to mark and cut the "notch" in a rafter (a standard carpentry task of home construction). In a preliminary study, he observed one of his workers performing this task five times. The observations were made in an air-conditioned, well-lit training facility, at ground level, with all tools and equipment clean and readily available. Observation: 1 2 3 4 5 Task time (seconds): 82 74 80 83 76 a. What is the actual average time for this task? b. What is the normal time for this task if the employee worked at a 20% faster pace than is typical for adequately trained workers? c. What is standard time for this task if allowances sum to 14%? d. If the analyst then thought more carefully about his experiment and decided that the allowances needed to be increased to match the real (outside, not air-conditioned)…arrow_forwardWhen is it required to log an error in a process?arrow_forward
- Time left 1:08:00 A can filling process at a beverage manufacturing factory is assumed to be in control with limits of 84 +3 had sample averages for the x-bar chart of the following: 87.1,87, 87.2, 89, 90, 88.5, 89.5, and 88. Which of the following statement below are correct? O a. Process mean is out-of-control O b. Not enough information to determine O c. Process mean is in-control O d. None is correct NEXT PAGE AGE o 日自 nere to searcharrow_forwardPrepare a run diagram for this emergency call data. Use five-minute intervals (i.e., count the calls received in each five- minute interval. Use intervals of 0-4, 5-9, etc.). Note: Two or more calls may occur in the same minute; there were three operators on duty this night. What can you conclude from the run chart? Call Time Call Time Call Time 1 2 3 4 5 6 7 8 9 10 11 1:03 1:06 1:09 1:11 1:12 1:17 1:21 1:27 1:28 1:29 1:31 12 13 14 15 16 17 18 19 20 21 22 1:36 1:39 1:42 1:43 1:44 1:47 1:48 1:50 1:52 1:53 1:56 23 24 25 26 27 28 29 30 31 32 33 1:56 2:00 2:00 2:01 2:02 2:03 2:03 2:04 2:06 2:07 2:08 Call 34 35 36 37 38 39 40 41 42 Time 2:08 2:11 2:12 2:12 2:13 2:14 2:14 2:16 2:19 a. re-organize the above data for your analysis (using five-minute intervals; 0-4, 5-9, etc) b. Provide your diagram that shows the number of emergency calls by eacn five-minute intervals from 1am to 2:20am c. what can you conclude from the chart?arrow_forwardAn analyst made 30 observations over 15 minutes during which 12 units where produced. For 9 observations, the worker was seen working. Compute for the observed time.arrow_forward
- 8. 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 of an employee assembling peanut valves re-sulted in the following set of observations. What is the stan-dard time, given a performance rating of 95 percent and anallowance of 14 percent of the total normal time?arrow_forwardA time study has revealed an average observed time of 5 minutes, with a standard deviation of 1.25 minutes. These figures are based on a sample of 75 cycles. Is this sample large enough for analyst Anand Paul to be 99.73% confident that the standard time is within 5% of the true value? The required sample size is (enter your response as a whole number). Is the sample large enough? O No O Yesarrow_forward
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