Pre-sourcing is an activity undertaken prior to sourcing. Sourcing activities is the search for information about goods/services through catalogs [14]. Catalogs are needed in this activity. Cataloging of goods/ services at PT. PLN was carried out in 2000 to 2003 in order to suppport the implementation of e-procurement system in 2005. Before e-procurement system was fully adopted, the catalog was just presented as a list of paper. Among possible impacts, PT. PLN realized the benefits of cataloging goods/services in e-procurement system.