I am doing scea part-2 assignment. As a note I am specifying some sample vendor/machine combinations as suggested by Cade's book. For example I am giving 16 GB RAM for the Web server and 16 GB for the App server and 32 GB for the db server. Do I need to justify those figures? In my assignment it is only specified that the system should be available for 24 by 7 but there is no mention for the number of concurrent users and other parameters. So how can I justify those figures for RAM, hard-disk, processors clock speed, core etc. ? I don't have any experience for the capacity planning, so I may be giving more expensive resources than what is normally required. Will it have a negative impact? Ranchars who have already passes scea and appearing for the same, please share your experience, opinion and suggestion.