1. We wish to assemble 240 cars in one hour. What should be the cycle time (in seconds)?

2. The following are the standard times (in seconds) of attaching each piece to its immediate predecessor(s). (Note: For items 5-9 and 13-16, the time includes time of assembling the sub-assemblies. Time of the first piece is for reaching and grasping it.) What is the theoretical minimum number of workstations needed if Cycle time= 15 seconds?

3. Pick an appropriate heuristic and cycle time of 15 seconds, and perform assembly-line balancing.

The precedence network for assembling the Lego Racer (8119) is shown at right. Forexample, the black rectangle (19) can be attached only after the yellow rectangle (12) and the two sides (2 and 3) are attached. Note that in order to reduce the size of problem (and possibly make assembly easier), items 5-9 and 13-16 are sub-assemblies.

Transcribed Image Text:

Task 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 Time 1 1 1 1 3 3 2 2 5 1 1 1 2 2 3 7 1 1 1 1 1 1