Ever wonder how retail giants like Wal-Mart can keep track of so much merchandise, not to mention keep their promise of maintaining low prices? The biggest secret behind this and other major retailers’ success stories is that they use an inventory management system. This way, the managers know which items are selling and which ones aren’t, so they can spread the word to their warehouses and prevent them from supplying either too much or too little. When your store boasts a tremendous selection of goods, maintaining inventory must be done as efficiently as possible.