This thesis is the result of a three-month internship undertaken as Supply Chain Analyst at Secrid, a Dutch pocket-wear brand Company based in the Hague. The core product of the company is a Cardprotector, first produced and patented in 2009. In the last ten years, the company has experienced a fast growth in sales and network connections, which led to a large number of products produced. The increasing of products requests worldwide created some difficulties in the inventory management and demand planning. The initial aim of the internship was to study and analyse an Inventory Management Software called NetStock, in order to better manage the large volume of products.