Question: In a machine shop, there are four machines Ml, M2, M3, and M4. They are identical in all respects and served by AGVs. Parts arrive with interanival time following exponential with a mean of 5 minutes. Machines do not have any buffer space. So an aniving part at the input area must first gain access to a free machine before it can be moved to the machine. When a machine finishes an operation, an AGV is Process requested and the machine is to be made free only after the part has been picked up by the· AGV. ing time follows normal with a mean of 8 minutes and a standard deviation of 2 minutes. It takes 30 seconds to load and.unload the parts. AGV takes the finished parts to the output station and the AGV is free to respond tO other requests, or is sent to the input area that as a staging area. The AGVs move at a speed of 25 meters per minute. The dimensions shown are in meters, and the intersections are 0 meter in length. Simulate this system for 2,500 minutes. Change the number of AGVs and analyze the impact on parts waiting _time.
