A project management system manages project schedule data using separate current and historical task schedule data structures. In general, current schedule data is stored separately from historical schedule data, so that the current schedule data may be retrieved separately from the historical task schedule...http://www.google.fr/patents/US7941445?utm_source=gb-gplus-shareBrevet US7941445 - Managing project schedule data using separate current and historical task schedule data and revision numbers
Managing project schedule data using separate current and historical task ...
