Restating the Requirements

To have clarity of analytical model of system you must state requirements specific performance constraints with optimization criteria in one document verify in another document. We can state the method of a solution.

Verify final model with the client. The necessary analysis should be confirmed and clearly understood by client. 

The impractical, incorrect or hypothetical objects that do not exist in real world should be removed from the proposed system.

You must note which analysis model is effective means of communication with application experts and not with computer experts. In summary, final model serves as the basis for design, system architecture and implementation.