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Nt1310 Unit 2 Agression Analysis

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TABLE 8: Response table for means for throughput Level I II III IV 1 0.08681 0.10573 0.08675 0.08697 2 0.08628 0.08086 0.08659 0.08659 3 0.08684 0.06334 0.0676 0.08638 Delta 0.00065 0.06239 0.00018 0.00071 Rank 3 1 4 2 As shown in response table gives that demand time is more influencing factor than other factors. Than velocity of AGVs affects the system utilization and distance preference is very less influencing factor for system utilization. TABLE 9: Response table for system utilization Level I II III IV 1 21378 30457 22194 21319 2 21236 18732 23118 21318 3 21340 15761 22633 21315 Delta 20895 15670 38956 20233 Rank 2 1 3 4 4.3. Optimization In this thesis, system throughput of system and system utilization both are optimized by genetic …show more content…

of AGVs Level 3 4 Velocity of AGVs - 61.396 System utilization obtained by value of above factor in simulation is 0.2081%. Apart from the single objective functions considered for this problem, a combined function is also used to perform the multi-objective optimization for the FMS parameters. The function and the variable limits are given using following function. Equal weights are considered for all the responses in this multi-objective optimization problem. Hence W1 and W2 are equal to 0.5. Using an above following combined function attained which is optimized by using genetic algorithm – Z multi = 0.5 × [1.49155 – 0.0000938× X(1) distance preferences – 0.049155 × X(2) arrival demand time + 0.0006566 × X(3) no. of carts + 0.0005628 × X(4) velocity of carts] – 0.5 × [1.4642 – 0.0005717×X(1) distance preferences – 0.049406 × X(2) arrival demand time + 19 × X(3) no. of carts + 0.0006390 × X(4) velocity of carts] Table 12: Factor and their level for maximizing throughput and system utilization through genetic algorithm Factors Level Value Distance presence Level 1 Smallest …show more content…

5.2 Conclusion In this thesis, a simulation modeling and optimization of FMS objectives for evaluating the effect of factors such as demand arrival time, no. of AGVs, velocity of AGVs, and distance preference between two work stations used in system. System utilization and throughput both are affected by these factors. It is observed that from comparing the result maximum percentage of utilization is 10% against of throughput parameters. System utilization and throughput is more affected by demand arrival time comparatively other three factors. Distance preference also affects throughput and system utilization. For both system utilization and throughput distance preference should be smallest and as the demand arrival time increases both system utilization and throughput of system decreases. Number of AGVs and velocity of AGVs are less

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