The order set fot the Joint optimization of item and pod storage assignment problems in robotic mobile fulfillment systems

The order sets are used in the study of joint optimization of item and pod storage assignment problems in robotic mobile fulfillment systems.
The order sets include three different classes of order set , "10pods-20SKUs" is the small-scale one, "200pods-250SKUs" is the medium-scale one, and "400pods-500SKUs" is the large-scale instance
The data file is named X_Y_ABC.mat. X represnts the order size, Y represents the number of SKUs, ABC represents the SKU demands follow the ABC rule.
The order sets are generated randomly under different order sizes {20, 100, 500, 1000}. The number of SKUs per order follows U [1,3].