by Simon Lambert
The Knowledge Engineering Group of the Department for Computation and Information at CLRC has long experience in the area of co-operative explanatory capabilities for infor-mation systems. Originating in early work on expert systems in the 1970s, these capabilities have become more advanced with the recognition that the goal is not simply to provide an explanation of a system's 'chain of reasoning', but to improve the effectiveness of its use in a whole variety of ways. The Knowledge Engineering Group is now working on the TAP-EXTRA project, partly funded by the European Commission as ESPRIT project 20719, to show the benefits that can result.
The type of industrial situations where there is a case for enhancing information systems with these co-operative explana-tory capabilities include the following:
TAP-EXTRA is a Trial Application, whose purpose is to apply a previously developed technology to demonstrate its benefits and show how the risks can be cushioned. The technology comes from a previous ESPRIT project, I-SEE (Interactive Self-Explanation Engine) in which CLRC was also a leading partner. As well as three demonstrator applications, I-SEE also developed a generic toolkit for enhancing information systems with capabilities such as:
The I-SEE toolkit consists of a number of components, including:
In TAP-EXTRA, the application, provided by the large French company Lyonnaise des Eaux, is a system for assisting with flood control in the city of Bordeaux. In times of heavy rainfall, large amounts of data arrive at the control room.
The existing application filters this data and presents messages to the user, but there is a need for a higher level explanatory assessment of the situation to assist in reliable decision making. Currently, the users' needs are being studied in detail and a number of scenarios are being developed, while in parallel the appropriate explanation techniques are being designed.
Simon Lambert - CLRC
Tel: +44 1235 445716