Designing Scripts to Guide Users in Modifying Knowledge-Based Systems

Knowledge Acquisition (KA)Scripts capture typical modificationsequencesthat users follow when they modify knowledgebases. KAtools can use these Scripts to guide users in makingthese modifications, ensuringthat they follow all the ramifications of the changeuntil it is completed. This paper describes our approachto design, develop, and organize a library of KAScripts. Wereport the results of three different analysis to develop this library, including a detailed study of actual modification scenarios in two knowledgebases. In addition to identifying a good numberof KA Scripts, wefounda set of useful attributes to describe and organize the KAScripts. These attributes allowus to analyzethe size of the library and generate newKAScripts in a systematic way. Wehaveimplemented a portion of this library and conducted twodifferent studies to evaluate it. The result of this evaluation showeda 15 to 52 percent time savings in modifying knowledgebases andthat the library included relevant and useful KA Scripts to assist users in realistic settings.

Authors

• Marcelo Tallis
• Yolanda Gil
• University of Southern California

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