Cycle Time for a Manufacturing Cell
The U-shaped manufacturing cell shown in Figure CS29 at the VBo Newton Company, has five single-cycle automatic machine tools (labeled M) and three manual stations (2, 3, 8, labeled H). The walking path of the operator, Pat, is shown with a dashed line. Table CS-29 gives times for unloading, loading, and part
checking for operations 1, 3, 5, 6, and 7; the machining cycle times for the operations; and the manual times for operations 2, 4, and 8. There are eight ‘‘walks’’ in the loop and 3 s are allowed for each walk. Single-cycle automatic machines can complete the machining cycle once it is initiated by the operator.
1. Calculate the cycle time for the cell. It should be less than the takt time of 89 s by almost 10%.
2. Calculate the throughput time for one part going from input to output.
3. Can the addition of a second operator double the output from the cell? Why or why not? Discuss.
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