The Wal-Mart is one of the largest retailing chain in the world and it has a huge dominance over the retail market. The Wal-Mart ensures that no item would be out-of-stock in the store as long as the producer is producing it. To maintain this they have to take the help of the forecasting method as well as they have to make the appropriate inventory decisions. The inventory decisions include two main questions, “how much to order” and “when to order” (Render, 2018). They use the forecasting method to get the answers of these two questions.