Innovative e-commerce ideas are characterized by commercial products yet unknown to the market, enabled by information technology such as the Internet and technologies on top of it. How to develop such products is hardly known. We propose a interdisciplinary approach, e -value , to explore an innovative e-commerce idea with the aim to understand such an idea thoroughly and to evaluate it for potential profitability. Our methodology exploits a requirements engineering's way of working, but employs concepts and terminology from business science, marketing and axiology. It shows how to model business requirements and improve business-IT alignment, in sophisticated multi-actor value constellations that are common in electronic commerce. In addition to the e -value approach methodology, we also present the action research-based development of our methodology, by using one of the longitudinal projects we carried out in the field of online news article provisioning.

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this paper, I review the history of HCI as steps toward a science of design. My touchstone is Simon's (1969) provocative book he Sciences of the Artificial. The book pre-dates HCI, and many of its specific characterizations and claims about design are no longer authoritative (see Ehn, 1988). Nevertheless, two of Simon's themes echo through the history of HCI, and still provide guidance for charting its continuing development

Modality Theory is a comparatively new field of investigation which addresses the following general problem of mapping task domain information into interactive multimodal interfaces: given any particular set of information which needs to be exchanged between user and system during task performance in context, identify the input/ output modalities which constitute an optimal solution to the representation and exchange of that information. This paper proposes a research agenda for Modality Theory and presents two steps towards its implementation. The first is a generative taxonomy of output modalities covering the media of graphics, sound and touch. The second is a methodology for carrying out information-mapping in design practice. As it matures, Modality Theory promises to provide useful support to contemporary designers of interactive human-computer interfaces who have begun to use a rapidly increasing number of different, and often alternative input/output modalities for the expression and exchange of information between systems and their users.

Scenarios have proven effective for eliciting, describing and validating software requirements

Software development remains mentally challenging despite the continual advancement of training, techniques, and tools. Because completely automating software development is currently impossible, it makes sense to seriously consider how tools can improve the mental activities of developers apart from automating them away. Such mental assistance can be called “cognitive support”. Understanding and developing cognitive support in software engineering tools is an important research issue but, unfortunately, at the moment our theoretical foundations for it are inadequately developed. Furthermore, much of the relevant research has occurred outside of the software engineering community, and is therefore not easily available to the researchers who typically develop software engineering tools. Tool evaluation, comparison, and development are consequently impaired. The present work introduces a theoretical framework intended to seed further systematic study of cognitive support in the field of software engineering tools. This theoretical framework, called RODS, imports ideas and methods from a field of cognitive science called “distributed cognition”. The crucial concept in RODS is that cognitive support can be understood and explained in terms of the computational advantages that are conferred when cognition is redistributed between software developer and their tools and environment. The name RODS, in fact, comes from the

Finding a person who has the experience to solve a specific precif is an imporKRI application ofr1SSWRI-1W systems to a difficultorcultRA1AWAR pr11Rr Pr11 systems have made attempts to implement solutions to thisprsRDAK but few systems haveunderC12 systematicuser evaluation. This wor descrDWA a systematic evaluation of theExperWAW Recommender (ER), a system thatrtRAKAC1R people who ar likely to haveexper1Ain a specific prcific ER and the or2-1CRICCW11 contextfor which it was designedar descredR toprAA2R a basisfor underDM-2RIC this evaluation.Pral t o conducting the evaluation, a baselineexpereRA2 showed that peoplear rpleRWKSgood at judging coworRD1- experRD when given an appr1RIM2W context. This finding prdingR a way to demonstrKW the effectiveness of ER bycompar-R ER's per-1MRIMK torRAAMM by coworARIM The evaluation, the design, andrdR2SW ar descrSRI in detail. ThereRDMD suggest that the parDMARIM-W agr with therRAKWAKRIM-W11 made by ER, and that ER significantly outpercant other experrc rperrcan systems when compared using similar metrics.

This paper presents an analysis of user studies from a review of papers describing new visualisation applications and uses these to highlight various issues related to the evaluation of visualisations. We first consider some of the reasons why the process of evaluating visualisations is so difficult. We then dissect the problem by discussing the importance of recognising the nature of experimental design, datasets and participants as well as the statistical analysis of results. We propose explorative evaluation as a method of discovering new things about visualisation techniques, which may give us a better understanding of the mechanisms of visualisations. Finally we give some practical guidance on how to do evaluation correctly.

TopicShop is an interface that helps users evaluate and organize collections of web sites. The main interface components are site profiles, which contain information that helps users select high-quality items, and a work area, which offers thumbnail images, annotation, and lightweight grouping techniques to help users organize selected sites. The two components are linked to allow task integration. Previous work [2] demonstrated that subjects who used TopicShop were able to select significantly more highquality sites, in less time and with less effort. We report here on studies that confirm and extend these results. We also show that TopicShop subjects spent just half the time organizing sites, yet still created more groups and more annotations, and agreed more in how they grouped sites. Finally, TopicShop subjects tightly integrated the tasks of evaluating and organizing sites.

Introduction Contemporary designers of interactive human-computer interfaces have the opportunity of being able to use a rapidly increasing number of different, and sometimes alternative, input/output modalities for the expression and exchange of information between computer systems and their users. The interface designer's task can be described roughly as follows: (1) Identify the information to be exchanged between user and system from an analysis of the task domain of the artifact to be built; (2) know your inventory of input/output modalities; (3) perform an optimal match in terms of functionality, usability, naturalness, efficiency, etc. between the task domain information and the available input/output modalities; and (4) design, implement and test the artifact. Today's interface designers have become highly skilled at performing these steps (non-sequentially, of course) using graphical user interfaces (GUIs) in combination with keyboard and mouse. However, we are still far from