1. The following figure depicts the mean (average) flow time for a job when the critical-ratio rule is used to dispatch workers at several machines required to complete the job. In the figure, WHN 1, WHN 2, and WHN 3 represent three different rules for determining when a worker should be transferred to another machine, and Where represents six rules for determining the machine to which the worker is transferred. Construct a 3 × 6 matrix A to represent these data, with entries rounded to the nearest integer.

Where
2. In an evaluation of labor assignment rules when workers are not perfectly interchangeable, Paul M. Bobrowski and Paul Sungchil Park created a dynamic job shop with 9 work centers and 9 workers, both numbered 1-9. The efficiency of each worker is specified in the following labor efficiency matrix, which represents the degree of worker cross-training.
(a) For what work center(s) is worker 7 least efficient?
(b) For what work center is worker 1 most efficient?
Work Center

WHN I WHN 2 WHN 3 35 Source: Bobrowski, P. M., and P. S. Park 30 25 15 10 2. + Flow time (hr/job) 1 1.00 0.95 0.95 0.95 0.95 0.85 0.85 0.85 0.85 0.85 1.00 0.95 0.95 0.95 0.95 0.85 0.85 0.85 W o 0.85 0.85 1.00 0.95 0.95 0.95 0.95 0.85 0.85 0.85 0.85 0.85 1.00 0.95 0.95 0.95 0.95 0.85 r 0.85 0.85 0.85 0.85 1.00 0.95 0.95 0.95 0.95 k 0.95 0.85 0.85 0.85 0.85 1.00 0.95 0.95 0.95 e 0.95 0.95 0.85 0.85 0.85 0.85 1.00 0.95 0.95 r 0.95 0.95 0.95 0.85 0.85 0.85 0.85 1.00 0.95 0.95 0.95 0.95 0.95 0.85 0.85 0.85 0.85 1.00