A one-worker manual assembly cell is shown. The walk times between stations is 5
ID: 350037 • Letter: A
Question
A one-worker manual assembly cell is shown. The walk times between stations is 5 seconds. The manual assembly times are as follows
Station 1 - 100seconds
Station 2- 120 seconds
Station 3- 50 seconds
Station 4- 70 seconds
A one-worker manual assembly cell is shown below 4 The walk times between stations is 5 seconds. The manual assembly times are as follows Station 1 Station 2 Station 3 Station 4 100 seconds 120 seconds 50 seconds 70 seconds Suppose any manual station in this cell can be replaced by a single-cycle machine. The assembly time for the machine is the same as the manual assembly time. For any station, the single-cycle machine takes 10 seconds to unload, load and start. Redesign the cell by replacing manual operations with a minimum number of single-cycle machines such that the one-worker cell cycle time (CT) is minimized. What is the resultant cell CT?Explanation / Answer
Old cycle time 2 3 1 4 Start Stop Complete manual cycle From To Time Work time Total Start 1 5 100 105 1 2 5 120 125 2 3 5 50 55 2 4 5 70 75 4 stop 5 0 5 Stop start 5 0 5 Total 370 New Cycle time 1 2 3 4 5 sec 5 sec Start 5 sec Stop Transition time 15 Unloading load etc 10 Machine time 340 CT 365
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