The method and system for facilitating operations based on data include a control system associated with a legacy database and then a master database. The control system generates a control signal for a particular activity, such as a real estate management system generating reminders completing a sale. The legacy database includes a legacy data profile, having legacy data fields, and legacy data. The master database includes a master data profile, having master data fields. A conversion menu associates master data fields with legacy data fields so as to form a conversion data field and a data template. Legacy data is transferred corresponding to the conversion data fields and forms converted legacy data in the master database. The control system now operates by the converted legacy data, so that the control signal is based on the master database. The system and method can be add-on software to the legal system.