How reliable is the result of work sampling activity in determining working time and idle time of the operator?
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How reliable is the result of work sampling activity in determining working time and idle time of the operator?
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- 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 = 4.615Prepare 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?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?
- Compare stopwatch time study and work sampling.What is Flow process charts ?Your twenty observations of Dr. Knowitall reveal the following information. Assume that the estimate is to be within 5 percent of the true proportion 96 percent of the time Activity Observed Number of Times Observed With patient 6 Reviewing test results 5 On phone 5 Idle 3 Away on emergency 1 Not available 1 Total 21 Calculate the sample size needed to estimate the proportion of time Dr. Knowitall spends away on emergencies.
- 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…State the difference between quantitative measurements and qualitative measurements.Determine the standard time of the process using the below-recorded observations. Hint: remove unusual time observations
- How are devices such as flow process charts and worker-machine charts useful?The following given is the 911 call data. Call Time Call Time Call 1 15 16 1:38 1:40 2 3 4 5 678 8 9 10 11 12 13 14 000 NO 1:04 1:07 01:04 1:07 1:12 57679 17 Run Chart A 18 1:14 1:14 20 1:19 21 1:24 22 1:29 1:29 1:31 1:35 1:35 1:35 19 23 24 25 222226 27 28 1:44 1:47 1:48 01:29 1:48 1:48 Time 29 2:06 30 Time m m m m m O Run Chart B 31 32 33 34 1:53 1:56 2:00 2:02 2:02 2:04 41 2:05 42 35 36 a. Select the Run chart for the above 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. Run Chart A Run Chart B 37 38 899 39 40 2:08 2:10 2:12 2:12 01:54 2:13 2:13 2:14 2:14 2:15 2:15 2:15 2:15 2:15 Run Chart C 02:20 8642O 01:04 01:29 Time 01:54 - 02:20 10 2864NO 01:04 Run Chart C 01:29 Time 01:54+ 02:20Describe the steps involved in conducting a work sampling study.