Question: Ch. 7: Design of Work Systems: Stopwatch Time Study Given the following data from a stopwatch time study for a particular task: OBSERVATION: 1 2

Ch. 7: Design of Work Systems: Stopwatch Time

Ch. 7: Design of Work Systems: Stopwatch Time Study Given the following data from a stopwatch time study for a particular task: OBSERVATION: 1 2 3 4 5 6 7 8 TIME (seconds): 17 18 15 14 13 15 16 12 1. What is the observed time for this task? (15 seconds) 2. If the person observed worked at a pace that is 80 percent of normal, what should be the normal time for this task? (12 seconds) 3. If the person observed worked at a pace that is 20 percent faster than average, what should be the normal time for this task? (18 seconds) 4. Referring to Question #2, if the appropriate allowance for this task is 25 percent of job time, what should be the standard time? (15 seconds) 5. Referring to Question #3, if the appropriate allowance for this task is 25 percent of the workday, what should be the standard time? (24 seconds) 6. What is the estimated standard deviation for the time it takes the observed worker to perform this task? [2 seconds) How many observations would be needed to be 95.44% confident that the maximum error in the observed time is 1 second? [16] How many observations would be needed to be 99.74% confident that the maximum error is 5% of the observed time? [64]

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