The third module was devoted to category management and master data, and we were again guided through the module by the great couple Miloš Olejník and Zdeněk Pytlíček (GasNet CZ). Both supporting topics were intertwined during the module and it was clearly confirmed that without quality data it is difficult to carry out category management. We learned about the eight basic cycles of category management, how to analyze data using ABC analysis, the Kraljic matrix, the A.T.Kearney procurement board and more.