Bruno Santana da Silva

Promoting a separation of concerns via closely-related interaction and presentation models

A common goal of HCI design processes is to provide an organized set of procedures and representations to develop high-quality interactive systems. However, we find large gaps between representations in existing approaches, and some representations do not have a clear scope or focus. This paper proposes to use a set of closely-related notations to address different sets of design issues in successive stages of design, aiming to achieve a clear separation of concerns. In particular, it focuses on the transition from an interaction model to an abstract presentation model.

Using Cases in Variability Analysis to Promote the Design of Flexible, Adaptable and Adaptive Systems

It is widely known that, for most computer applications, their users and contexts of usage are quite heterogeneous and change in time. A variability analysis approach was developed to bridge the gap between Requirements Engineering and Human-Computer Interaction can help identify these variations and design flexible, adaptable and adaptive solutions that accommodate them at interaction time, i.e., during system usage. The core assumption of the approach is that an in-depth exploration of how user goals can be formulated into diverse user requests expressed in a linguistic structure using cases, designers will be better equipped to create solutions that cope with variations during user-system interaction. This paper shows how a set of adaptation-related questions and related interactive solutions may help to bridge the problem and solution spaces of flexible, adaptable and adaptive systems.