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.

InstancesLBObjDistanceVariance

Small-scale2010161000797962
0.5828224.67
0.55838313.56
0.6848412.67
0.6585858
0.786866

Medium-scale250200240500036383638845.84
0.53896389616.86
0.553908390812.82
0.63939393910.53
0.65394639469.96
0.7408940899.43

Large-scale500400448150004307743077992.91
0.54410544105225.21
0.554438544385204
0.64453844538194.62
0.654473044730185.21
0.74516045160165.06

The bold values in Table 7 indicate the optimal values of obj, distance, and variance at the three instances.