CH_07_10th_Edition

# CH_07_10th_Edition - Design of Work Systems CHAPTER 7...

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Design of Work Systems CHAPTER 7 DESIGN OF WORK SYSTEMS PROBLEMS P1. A time study analyst is planning a work sampling study to estimate the percent of idle time in the packing department. The department consists of a foreman and three workers. The hourly wage of the foreman is \$15 and the wage of the workers is \$8. A time study technician has made 300 observations of these four employees at random times, producing the data below. Idle observations: 60 Working observations: 240 Total observations: 300 a. What is the estimate of the percent of idle time? b. What is the maximum error assuming a 98 percent confidence level (z = 2.33)? c. Estimate the weekly loss due to idle time in the packaging department. The department works a 40-hour week. d. Suppose that an estimate of idle time within 2 percentage points, either way, is required. How many more observations should be taken? Again, assume a 98 percent confidence level. P2. In the course of manufacturing an amplifier, an off-on switch must be attached to the front panel. A time study analyst wishes to determine how long it takes an experienced employee to perform

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## This note was uploaded on 04/20/2011 for the course TOM 301 taught by Professor Williamcosgrove during the Spring '08 term at Cal Poly Pomona.

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CH_07_10th_Edition - Design of Work Systems CHAPTER 7...

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