Scenario-based modelling

Scenario based modelling is an inexpensive rapid prototyping technique. This method is effective when systems are being built with the requirements vaguely known at the outset. Users are involved right from the start, to build prototypes evolving towards the final product. The users are also involved with the testing of the prototypes which is essential for the validation of requirements and help the users to gain an initial experience of the final system during the development itself. This method involves techniques which are applied by one or more professionals working alongside users who are expected to provide and specify their requirements at the beginning as well as evaluate and approve the system upon completion. The user (in a passive capacity) and the designer/builder (an active partner) cooperate to reach a working model where the means of communications are by the examination of preliminary models such as the initial narratives, paper models and graphical representations built to represent the final system functions