System Overview 101

System Overview 101 A second constraint was the need to design the program to accommodate a large and changing body o.f technical knowledge. It has become clear that large amounts of task-specific knowledge are required for high performance and that this knowledge base is subject to significant changes over time (Buchanan and Lederberg, 1971; Green et al., 1974). Our choice of a production rule representation was significantly influenced by such features of the knowledge base. A third demand was for a system capable of handling an interactive dialogue and one that was not a "black box." This meant that it had to be capable of supplying coherent explanations of its results, rather than simply pririting a collection of orders to the user.