A method and system is disclosed for maintaining a database of configurations of mechanical equipment. A functional configuration database is established to store functional information about an end item and internal components of the end item. A logical configuration database is established that corresponds to the functional configuration database. A physical configuration database is established to store physical information about the end item. An operational configuration database is established to store operational information about the end item. The database of configurations of mechanical equipment is maintained in accordance with the functional configuration database, the logical configuration database, the physical configuration database and the operational configuration database.