You don't need to design SAP HRIS, systems, its already there. Mostly comapnies will ask you add few things here and remove this and that. To give you a simple example of hotmail email account. By default in hotmail, you see couple of Tabs there ->Today | Mail | Calender | Contacts. And on left side you see list of default folders -> Inbox, Junk E-Mail, Drafts,Sent Message, Trasch Can and rest of folders that you created. Now assume that hotmail is SAP's product that this company is using it. And wants to customize it because there are certain things they don't want their employees and on other hand wants to add some features. Say company don't want employees to create Folder, then consultant like you come in and remove that feature. Or company wants to integrate and add time entry (modules of HRIS) on top TAB so that final look would be Today | Mail | Calender | Contacts | Time Entry And yes, most, almost all SAP users are mid-range to large scale companies. Mid-range is often defined as company with at-least $250 mil (it varies)annual business. Some define this as Market Cap of $5 billion or less. So you should really go for this too, ask Mr Pritesh Upadyay, I heard from people in Dallas, TX that he too started as Consultant or something there. And now trying to start his own business, he knows well where these $$$ are in IT business.