Mostafa, If you can pry some funding loose, you might look at BEZVision (http://www.bez.com/bez-db_tour.htm). Have worked with, not for, the company before on earlier versions and it's damn good. Predicted our disk growth for PeopleSoft to the month as well as CPU and other factors. The engineering crew are a real bunch of "propeller heads" who know more about operating systems that I ever care to learn. Dick Goulet Senior Oracle DBA ________________________________ From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of Mostafa Eletriby Sent: Wednesday, December 15, 2010 2:23 AM To: ora-apps-dba@xxxxxxxxxxxxx; oracle-l@xxxxxxxxxxxxx; oracle-tips@xxxxxxxxxxxxx Subject: datafiles growth prediction factors Hello DBAs, I need some standard methods to follow & certain factors to check regularly in order to predict data files growth prediction at new implementations for Oracle Apps R12 , & 11i too. As some standard modules of financial track ( AP, AR , FA, ... ) which are implemented at start of project. then more implementations are at starting phases & same for number of users which are increasing by going live for the project. Thanks Mostafa