14. The Philip Company has the following processing time data for machines 1, 2, 3, and 4. Routing for each job begins at machine 1 and ends at machine 4:

Processing Time

(in Hours)

Job Machine 1 Machine 2 Machine 3 Machine 4 A 6 2 4 2 B 1 8 7 5 C 5 7 2 3 D 4 4 1 6

a. Prepare a schedule for a four-machine manufacturing cell using the M-machine heuristic.

b. In what sequence should Philip process the jobs to minimize make-span? Follow the same processing sequence at each machine in the cell.

c. Construct a Gantt chart of the best sequence schedule for all four machines.