Does modelling, formal or otherwise, play a role in designing interactive systems? A proliferation of interactive devices and technologies is used in an ever increasing diversity of contexts and combinations in professional and every-day life. This development poses a significant challenge to modelling approaches used for the design of interactive systems. The papers in this volume discuss a range of modelling approaches, the representations they use, the strengths and weaknesses of their associated specification and analysis techniques and their role in supporting the design of interactive systems.

This book is the formal proceedings of the Eurographics Workshop on Design, Specifi cation and Verification ofInteractive Systems, DSV-IS'99, which was held at the Uni versity of Minho, Braga, Portugal from June 2 to June 4, 1999. The previous events of this series were held at Pisa, Toulouse, Namur, Granada, and Abingdon; the theme this year was "Engaging the Mind by Enriching the Senses", emphasising the importance of the interface in making interaction both effective and enjoyable. Presentations and discussions covered topics that included specification methods and their use in design, model-based tool support, task and dialogue models, distributed col laboration, and models for VR input. As in previous years, there was a strong emphasis on formal representations and modelling techniques, and their use in understanding in teraction and informing the design of artefacts. However, the aim of the workshop is to encourage an exchange of views within a broad community, and other approaches, in particular tool support for model-based design, were also represented. This book includes the papers of the two invited speakers (one as an abstract only), the fourteen full papers accepted for publication, two shorter position papers, and the reports from the working group discussions. The format of the workshop aimed to mix formal paper presentations with informal discussion sessions, with the two invited talks setting the tone for the meeting.

This book constitutes the thoroughly refereed post-proceedings of the 8th International Workshop on the Design, Specification, and Verification of Interactive Systems, DSV-IS 2001, held in Glasgow, Scotland, UK, in June 2001. The 12 revised full papers presented have gone through two rounds of reviewing, selection, and revision. The book offers topical sections on mobile interface design, context-sensitive interfaces, supervision and control systems, temporal and stochastic issues, and new perspectives.

The wait for the year 2000 was marked by the fear of possible bugs that might have arisen at its beginning. One additional fear we had during this wait was whether - ganising this event would have generated a boon or another bug. The reasons for this fear originated in the awareness that the design of interactive systems is a fast moving area. The type of research work presented at this unique event has received limited support from funding agencies and industries making it more difficult to keep up with the rapid technological changes occurring in interaction technology. However, despite our fear, the workshop was successful because of the high-quality level of participation and discussion. Before discussing such results, let us step back and look at the evolution of DSV-IS (Design, Specification and Verification of Interactive Systems), an international wo- shop that has been organised every year since 1994. The first books that addressed this issue in a complete and thorough manner were the collection of contributions edited by Harrison and Thimbleby and the book written by Alan Dix, which focused on abstractions useful to highlight important concepts in the design of interactive systems. Since then, this area has attracted the interest of a wider number of research groups, and some workshops on related topics started to be organised. DSV-IS had its origins in this spreading and growing interest. The first workshop was held in a monastery located in the hills above Bocca di Magra (Italy).

This book constitutes the refereed post-proceedings of the 12th International Workshop on Design, Specification, and Verification of Interactive Systems, DSV-IS 2005. The 20 revised full papers, 1 keynote paper, and 4 summaries of group discussions are organized in topical sections on teams and groups, sketches and templates, away from the desktop, migration and mobility, analysis tools, model-based design processes and tools, and group discussions.

As its name suggests, the EHCI-DSVIS conference has been a special event, merging two different, although overlapping, research communities: EHCI (Engineering for Human-Computer Interaction) is a conference organized by the IFIP 2.7/13.4 working group, started in 1974 and held every three years since 1989. The group’s activity is the scientific investigation of the relationships among the human factors in computing and software engineering. DSVIS (Design, Specification and Verification of Interactive Systems) is an annual conference started in 1994, and dedicated to the use of formal methods for the design of interactive systems. Of course these two research domains have a lot in common, and are informed by each other’s results. The year 2004 was a good opportunity to bring closer these two research communities for an event, the 11th edition of DSVIS and the 9th edition of EHCI. EHCI-DSVIS was set up as a working conference bringing together researchers and practitioners interested in strengthening the scientific foundations of user interface design, specification and verification, and in examining the relationships between software engineering and human-computer interaction. The call for papers attracted a lot of attention, and we received a record number of submissions: out of the 65 submissions, 23 full papers were accepted, which gives an acceptance rate of approximately 34%. Three short papers were also included. The contributions were categorized in 8 chapters: Chapter 1 (Usability and Software Architecture) contains three contributions which advance the state of the art in usability approaches for modern software engineering.

This book constitutes the thoroughly refereed post-proceedings of the 9th International Workshop on the Design, Specification, and Verification of Interactive Systems, DSV-IS 2002, held in Rostock, Germany in June 2002. The 19 revised full papers presented have gone through two rounds of reviewing, selection, and improvement. All aspects of the design, specification, and verification of interactive systems from the human-computer interaction point of view are addressed. Particular emphasis is given to models and their role in supporting the design and development of interactive systems and user interfaces for ubiquitous computing.

This work brings together papers written by researchers and practitioners actively working in the field of human-computer interaction. It should be of use to students who study information technology and computer sciences, and to professional designers who are interested in User Interface design.

The papers collected here are those selected for presentation at the Eighth IFIP Conference on Engineering for Human-Computer Interaction (EHCI 2001) held in Toronto, Canada in May 2001. The conference is organized by the International Federation of Information Processing (IFIP) Working Group 2.7 (13.4) for Interface User Engineering, Rick Kazman being the conference chair, Nicholas Graham and Philippe Palanque being the chairs of the program committee. The conference was co-located with ICSE 2001 and co-sponsored by ACM. The aim of the IFIP working group is to investigate the nature, concepts, and construction of user interfaces for software systems. The group's scope is: • to develop user interfaces based on knowledge of system and user behavior; • to develop frameworks for reasoning about interactive systems; and • to develop engineering models for user interfaces. Every three years, the working group holds a working conference. The Seventh one was held September 14-18 1998 in Heraklion, Greece. This year, we innovated by organizing a regular conference held over three days.

This book covers methods for user interface design and evaluation. It shows how the systematic use of task models can make the design and development of interactive software applications easier and more effective, and how it can lead to improved usability. Useful examples of how to apply the methods will be of interest to application developers. A website containing additional exercises and pointers to relevant freeware will also be available.