HW-03-12-08s-2 - IE 131 Homework Problems due(Chs 8 and 12...

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IE 131 Homework Problems due Mar 12, 2008 (Chs 8 and 12) 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. Solution : (a) Pareto chart. 36 2 29 4 300 200 12 4 120 86 100 73 42 37 16 9 Dept 5 6 8 7 9 4 10 3 1 2 (b) Begin taking corrective action in Dept 5.
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