032511_HW3_Mar25 (1)

032511_HW3_Mar25 (1) - HW3 131 set March 25 Deadline;...

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HW3 131 – set March 25 Deadline; solutions to be posted before noon on Saturday April 2 7.2 A planned project contains the activities shown in the table below, along with their required completion times and precedence. (a) Construct the Gantt chart for the project. (b) Determine the critical path and the estimated time to complete the project. Activity 1 2 3 4 5 6 7 8 9 Activity time (days) 1 4 3 7 5 2 6 9 4 Immediate predecessor - 1 1 1 2 3, 4 5, 6 4 7,8 8.1 A factory has 10 departments, all of which have quality problems leading to delays in shipping products to customers. A breakdown of the number of quality problems for each department (listed alphabetically) is as follows: (1) assembly, 16; (2) final packaging, 9; (3) finishing, 37; (4) forging, 73; (5) foundry, 362; (6) machine shop, 294; (7) plastic molding, 120; (8) receiving inspection, 124; (9) sheet metalworking, 86; and (10) tool- making, 42. (a) Construct a Pareto chart for this data. (b) Assuming that all quality problems are of equal value, in which department would you start to take corrective action to reduce the quality problems? (c) Determine the percentage of total quality problems that are attributable to the two departments (20% of the departments) with the most quality problems. 12.4 In the ABC machine shop, workers punch in at 8:00 a.m. and punch out at 4:30 p.m. The labor-management agreement allows 30 min for lunch, which is not counted as part of the 8-hour shift. In determining the allowance for computing time standards, two 15 min breaks are provided (personal time and fatigue), one in the morning and one in the afternoon; and 20 min have been negotiated as lost time due to supervisor interruptions and equipment malfunctions. What PFD allowance factor should be added to the normalized time to account for these losses in the computation of a standard time, so that if the worker works at standard performance, he/she will produce exactly eight standard hours? Just read the following two questions - study and contemplate the answers – DULY NOTE
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This note was uploaded on 07/08/2011 for the course IE 131 taught by Professor Groover during the Spring '08 term at Lehigh University .

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032511_HW3_Mar25 (1) - HW3 131 set March 25 Deadline;...

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