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 problem | Objective function | Picking aisles’ workload balance | Literature |
| ISAP | Maximize 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] |
| PSAP | Minimize robots’ movement distance | √ | Wang et al. [10] | Minimize robots’ movement cost | × | Keung et al. [26] |
| Two-stage optimization of ISAP and PSAP | ISAP: Maximize the items’ relevances | √ | Li et al. [30] | PSAP: Minimize robots’ movement distance | ISAP: Maximize the items’ relevances | √ | Yuan et al. [9] | PSAP: Minimize robots’ movement distance |
| Joint optimization of ISAP and PSAP | Minimize robots’ movement distance | √ | This article |
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