Browsing by Author "Sanborn, J.C."
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Item A Modifiable Approach to Expert Systems Development.(1987) Sanborn, J.C.; ISRRule based expert systems programmers experience similar difficulties in developing and maintaining large application programs: rules become instantiated when they shouldn't; the execution order of rules is undesirably nondeterministic, or worse, simply incorrect; and modifications to program behavior are difficult or unwieldy. All of these problems arise from the control strategies used by the development language, their implementation, and the programmers control over (and awareness of) them. This paper explores the impact of rule based program control on overall program modifiability. We present a language designed with efficiency, modifiability, and ease of use in mind. Throughout, we discuss traditional control strategies, improvements made through our research, and directions for futher study.Item Towards Dynamic Planning.(1987) Sanborn, J.C.; Hendler, James A.; ISRMany desirable application domains for planning are inherently dynamic: representation of the domain is ill-specified or incomplete, the existence or verity of information changes with time, and situations arise during plan execution that were not taken into account at plan generation time. Unfortunately, the traditional approach to planning and problem solving has concentrated most heavily on generating plans, with little attention given to problems associated with plan execution. As a result, these planners have not been generally successful when applied to many physical domains.