Asset Management is used to manage the assetes and Change Management is used to manange the bussiness outcome.
Asset Management has concerned with assets to develop, operate, control and manage them properly. In this, undiscoverable data has to be managed for the business purpose by using scanning barcodes, RFID tags etc.
Change management is used to manage the people side to get the required outcome from the business by using better the process, techniques and tools. In this configuration of items has importance to maintain the services.