The company adopted some of the above suggestions, namely the installation of a simple WMS and a change in the location of its products, following an ABC analysis. The storage mode changed to demand-based, hence the fast moving products were placed closer to the section entrance to reduce the travel and return times. Also, two piles were allocated on each side section, where the remainders under 20 sheets would be placed (see the broken lot piles in Figure 1). The company did not switch to zone picking,because separating the items of the different order packs needs extra space. Also, the company could not consider our suggestion to reduce the storage depth levels, since this required building an additional
warehouse.