1. Functional consultant is expected to generate knowledge about the current business process, design current business flows, study current business processes and its complication, in all we can say getting through with current business setup. Flow diagrams and DFD are prepared, most of the time in Vision format, all this forms the part of AS IS document.
2. Everything configured has to be documented as per their categories in the form of predefined templates, these have to be then approved by the team leads or who ever the consultant is reporting to.
3. Mapping and GAP analysis is done for each module, I have seen people defining integration after mapping, gap analysis and configuration is done, but as per my experience in implementation, it is a simultaneous process.
4. Before starting configuring future business processes in SAP, the DFD/ERD are prepared, this documentation is called TO BE, which can be also siad as the result of mapping and gap analysis.
5. Sometimes Functional consultants are also expected to prepare test scripts for testing the configured scenarios.
6. End user manual and user training is also expected from F.Consultants.
Then the main task starts: customizing the respective business area and making sure the system reacts in the manner according to the constraints of the requested use case.
The consultant documents the settings and prepares proper guidelines that allow other consultants to do further changes or repairs with due efforts.
The consultant takes care that proper training is given to the users and that the system is usable, performing appropriately and the business flow is complete and correct.
During go live he assists the technical staff by testing the behaviour of the system.
After go live he guarantees that the procedures remain usable and consistent in real live situation and proposes enhancements.
The main duty of a consultant is to transfer external know-how to the client. It is not manpower that counts but intelligence, understanding of processes, a feeling for defects and general a common sense.