Research Article

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

Table 1

Summary of the literature on SAP at the strategic level of RMFS.

Research problemObjective functionPicking aisles’ workload balanceLiterature

ISAPMaximize the items’ relevances×Xiang et al. [7]
Maximize the items’ relevances×Guan and Li [24]
Maximize the items’ relevances×Kim et al. [23]
Minimize robots’ movement distance×Mirzaei et al. [25]
Maximize the items’ relevances and minimize pickers’ energy expenditure×Zhang et al. [3]

PSAPMinimize robots’ movement distanceWang et al. [10]
Minimize robots’ movement cost×Keung et al. [26]

Two-stage optimization of ISAP and PSAPISAP: Maximize the items’ relevancesLi et al. [30]
PSAP: Minimize robots’ movement distance
ISAP: Maximize the items’ relevancesYuan et al. [9]
PSAP: Minimize robots’ movement distance

Joint optimization of ISAP and PSAPMinimize robots’ movement distanceThis article