Research Article

Joint Optimization of Item and Pod Storage Assignment Problems with Picking Aisles’ Workload Balance in Robotic Mobile Fulfillment Systems

Table 4

Results of Gurobi and IGA for the small-scale instances.

GurobiIGA
ObjTime (sec)ObjGap (%)Time (sec)

2010163201212.35120.0011.69
20101631007993.27790.0078.63
2010163500497239135010.802756.61
2010163100010363716310561.933573.97
2010163150016324667.53

The bold value in Table 4 indicates the maximum Gap of IGA and Gurobi.