[Context and motivation] It is desirable that requirement engineering methods are reliable, that is, that methods can be repeated with the same results. Risk assessments methods, however, often have low reliability when they identify risk mitigations for a system based on expert judgement. [Question/problem] Our goal is to assess the reliability of an… (More)
Protection of society against natural and man-made disasters is high on the societal and political agenda. Effective crisis management is more important than ever. Nowadays, crisis organisations depend crucially on reliable telecom services, and unexpected failure of telecommunication may have serious consequences. In order not to be caught unprepared,… (More)
Crisis organisations depend on telecommunication services; unavailability of these services reduces the effectiveness of crisis response. Crisis organisations should therefore be aware of availability risks, and need a suitable risk assessment method. Such a method needs to be aware of the exceptional circumstances in which crisis organisations operate, and… (More)
—In this paper we consider service-oriented applications composed of component services provided by different, economically independent service providers. As in all composite applications , the component services are composed and configured to meet requirements for the composite application. However, in a field experiment of composite service-oriented… (More)
In this paper, we discuss possible risks posed by the application of tailorable context-aware systems in real-life practices. We use a tailorable context-aware system in the homecare domain as a case study to identify and analyse such risks. Next, we discuss which of these risks can be generalized to the use of tailorable context-aware system in other… (More)
Telecommunication services are essential to modern information systems, especially so for crisis management. Telecoms systems are complex and difficult to analyse. Current risk assessment methods are either not used because of their complexity, or lack rigorous argumentation to justify their results because they are oversimplified. Our challenge has been to… (More)
Druid is a user interface management system (UIMS) for building complex, highly interactive graphical user interfaces (UIs). Druid is based on three fundamental principles.
Risk assessment of unavailability of telecommunication services is an important part of an organisation's business continuity management. We developed the Raster method to enable organisations to assess their telecommunication service unavailability risks. To validate Raster in practice we conducted two field tests in which the Raster method was applied at… (More)