Penultimate Support Systems makes fairly good speaker and equipment support stands for music groups. The assembly process involves two operations:
(1) fabrication, or cutting aluminum tubing to the correct lengths, and (2) assembly, with purchased fasteners and injection-molded plastic parts. Setup time for assembly is negligible. Fabrication setup time and run time per unit, assembly run time per unit, and the production schedule for next week follow. All jobs arrived at the same time. Organize the work to minimize makespan, and create a Gantt chart. Can this work be accomplished within two 40-hour shifts?

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ASSEMBLY FABRICATION Run Time Run Time (hr/unit) Model Quantity Setup (hr) (hr/unit) 0.050 200 2 0.04 300 3 0.070 0.10 100 0.12 0.050 D 250 0.064 0.60