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<p><b>Abstract</b>—We give a formal relation-based definition of scenarios and we show how different scenarios can be integrated to obtain a more global view of user-system interactions. We restrict ourselves to the <it>sequential</it> case, meaning that we suppose that there is only one user (thus, the scenarios we wish to integrate cannot occur concurrently). Our view of scenarios is state-based, rather than event-based, like most of the other approaches, and can be grafted to the well-established specification language <b>Z</b>. Also, the end product of scenario integration, the specification of the functional aspects of the system, is given as a relation; this specification can be refined using independently developed methods. Our formal description is coupled with a diagram-based, transition-system like, presentation of scenarios, which is better suited to communication between clients and specifiers.</p>
Scenario, integration, user-system interaction, requirements elicitation, relational approach, state-based approach.

R. Khédri, M. Frappier, J. Desharnais and A. Mili, "Integration of Sequential Scenarios," in IEEE Transactions on Software Engineering, vol. 24, no. , pp. 695-708, 1998.
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