Research Article
Joint Optimization of Item and Pod Storage Assignment Problems with Picking Aisles’ Workload Balance in Robotic Mobile Fulfillment Systems
Table 7
Results of the influence of picking aisles’ workload in different scale instances.
| Instances | | | L | B | | Obj | Distance | Variance |
| Small-scale | 20 | 10 | 16 | 100 | 0 | 79 | 79 | 62 | 0.5 | 82 | 82 | 24.67 | 0.55 | 83 | 83 | 13.56 | 0.6 | 84 | 84 | 12.67 | 0.65 | 85 | 85 | 8 | 0.7 | 86 | 86 | 6 |
| Medium-scale | 250 | 200 | 240 | 500 | 0 | 3638 | 3638 | 845.84 | 0.5 | 3896 | 3896 | 16.86 | 0.55 | 3908 | 3908 | 12.82 | 0.6 | 3939 | 3939 | 10.53 | 0.65 | 3946 | 3946 | 9.96 | 0.7 | 4089 | 4089 | 9.43 |
| Large-scale | 500 | 400 | 448 | 1500 | 0 | 43077 | 43077 | 992.91 | 0.5 | 44105 | 44105 | 225.21 | 0.55 | 44385 | 44385 | 204 | 0.6 | 44538 | 44538 | 194.62 | 0.65 | 44730 | 44730 | 185.21 | 0.7 | 45160 | 45160 | 165.06 |
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The bold values in Table 7 indicate the optimal values of obj, distance, and variance at the three instances.
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