We are in the process of implementing the customer portal for our CRM system (Oracle Siebel). Need to know how to estimate the number of concurrent users based on the active members in the database. Currently we have about 1 million active members in the database with 40% email address penetration. Based on this information, how can we derive the number of concurrent users who will access the portal when it is implemented?
Software/Hardware used: Oracle Siebel - Hardware to be sized