The dissertation regards the study of the implementation of a WMS (Warehouse Management System) methodology for finished and semi-finished goods in the Osimo production plant’s warehouse of Ariston Thermo Group, aiming for the improvement of the processes’ efficiency in order to reduce stocking, handling and delivery times of the merchandise. Along the thesis, it is described the working environment in which the speaker is immersed and the general processes and concepts regarding warehousing activities performed in a plant. Some of these are the main indicators used to measure the efficiency of processes, philosophies and methodologies of work and the concepts behind a Warehouse Management System (WMS) software and its main functionalities.