Simulating textual scenarios using state charts

This paper describes an approach that enables early analysis of the dynamic behaviour of textual scenarios by simulation. It is commonly accepted that detecting defects as early as possible is central in the development process. However, for the early phases, the only available techniques are usually static ones, such as inspections, making analysis of the dynamic behaviour difficult. This paper presents an approach where textual scenarios, which represent system requirements, are transformed into state charts. The state charts are then simulated, making an analysis of the dynamic behaviour possible. Early experiences indicate that many defects, otherwise difficult to detect, are found both in the transformation and in the simulation. As the transformation is straightforward and relatively inexpensive, the benefits seem to outweigh the costs.