We report on the application of the use-case modeling technique to identify and specify the user requirements of the MammoGrid project in an incremental and controlled iterative approach. Modeling has been carried out in close collaboration with clinicians and radiologists with no prior experience of use cases. The study reveals the advantages and limitations of applying this technique to requi...

Requirements engineering for web applications entails new demands, compared to traditional software applications. This paper proposes a mockup-driven fastprototyping methodology to help elicit and finalize system requirements, as well as facilitate adjustments to quickly changing user requirements typical of web applications. This strategy minimizes the risk of wasting valuable development effo...

web search engines are one of the most popular tools on the internet which are widely-used by expert and novice users. constructing an adequate query which represents the best specification of users’ information need to the search engine is an important concern of web users. query expansion is a way to reduce this concern and increase user satisfaction. in this paper, a new method of query expa...

User interface (UI) prototyping (UIPing) (Connell and Shafer 1989, 1995) is a commonly employed requirements elicitation and validation technique, used to determine the functionality, UI, data structure, and other characteristics of a system. User requirements are explored through experimental development, demonstration, refinement, and iteration. The UI prototype (UIP) is built during the requ...

According to the Zachman framework for system architecture, business requirements and user information requirements should be separately modelled to enhance the maintainability and adaptability of the information systems and to improve the flexibility of the system development process. The measurement of business requirements is largely an unexplored field since requirements specification measu...

Web search engines are one of the most popular tools on the Internet which are widely-used by expert and novice users. Constructing an adequate query which represents the best specification of users’ information need to the search engine is an important concern of web users. Query expansion is a way to reduce this concern and increase user satisfaction. In this paper, a new method of query expa...

Using a pervasive healthcare system as example, a new approach to specification of user requirements for pervasive IT systems is presented. A formal modelling language, Coloured Petri Nets, is applied to describe what we call Executable Use Cases, EUCs. EUCs are precise, detailed, and executable descriptions of future work processes and their computer support. In particular, EUCs allow user req...

Care organizations, such as hospitals, need to support complex and dynamic workflows. Moreover, many disciplines are involved. This makes it important to avoid the typical disconnect between requirements and the actual implementation of the system. This paper proposes an approach where an Executable Use Case (EUC) and Colored Workflow Net (CWN) are used to close the gap between the given requir...

In this paper, we describe a case study of computer-supported collaborative learning in design using FM (FlashMeeting), a Web-based video-conferencing tool offered freely on OpenLearn. This 6-week experiment, involving Open University students and staff, aimed to explore the capabilities of FM software to support several phases of the design process including formulating a design brief, discove...