S.W. Tu, Y. Shahar, J. Dawes, J. Winkles, A.R. Puerta, and M.A. Musen. A Problem-Solving Model for Episodic Skeletal-Plan Refinement. Knowledge Acquisition, 4:197--216, 1992.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....significant periods of time, such as ONCOCIN [Tu et al. 1989] in the oncology domain and THELPER [Musen et al. 1993] in the AIDS domain. The task specific architecture underlying both of these systems has been abstracted into the episodic skeletal plan refinement (ESPR) problem solving method [Tu et al. 1992]. The ESPR method decomposes the task of guideline based therapy into three subtasks: instantiation and decomposition of a specific plan, identification of problems, and revision of the current plan. A different approach to automated support of guidelinebased therapy is the critiquing method: the ....

Tu, S.W., et al. (1992). A Problem-Solving Model for Episodic Skeletal-Plan Refinement. Knowledge Acquisition 4(2), 197--216.

.... for addressing generic tasks in a domain independent way [8, 31, 28, 3, 11] Over the years, the knowledge engineering community identified and developed PSMs of general usefulness [6, 3] or for specific high level tasks such as classification [8, 23] diagnosis [2] design [29, 22] and planning [33, 32]. A PSM that the knowledge aquisition community studied at length is propose and revise [19] a method that conducts a state based search algorithm to perform constraint satisfaction problem solving. More specifically, propose and revise calculates a valid configuration of domain parameters ....

S.W. Tu, Y. Shahar, J. Dawes, J. Winkles, A.R. Puerta, and M.A. Musen. A Problem-Solving Model for Episodic Skeletal-Plan Refinement. Knowledge Acquisition, 4:197--216, 1992.

.... the problem of determining patient eligibility for clinical trial protocols, we defined the proposition logic and heuristic score assignment methods [39] Finally, to manage patients being treated using clinical trial protocols, we built the ESPR method and its associated methods and mechanism [38] (Figure 4) 2.4. Mapping Relations For problem solving methods to be reusable across different domains, they must be defined in domain independent terms. Domain ontologies that define the terms and relations of application areas to be reusable across different tasks should be defined ....

S.W. Tu, A problem-solving model for episodic skeletal-plan refinement , Knowledge Acquisition. 4 (1992) 197--200. 25

....for complete development environments that support all facets of expert system construction from mechanisms. In the next section, we describe such an environment: PROTG II, a system under development at our laboratory. 3. Overview of PROTG II The PROTG II environment [Puerta et al. 1992; Tu et al. 1992] is a descendant of PROTG [Musen, 1989] which was a knowledge acquisition tool founded on a single problem solving method, but that did not incorporate the concept of a mechanism. PROTG II is designed Task Mechanism Method Mechanism Mechanism Mechanism Subtask Subtask Subtask Result (a) ....

Tu, S.W., Shahar, Y., Dawes, J., Winkles, J., Puerta, A.R., and Musen, M.A. (1992). A problemsolving model for episodic skeletal-plan refinement. Knowledge Acquisition, 4, 197--216.

....problem of automating the construction of knowledge acquisition tools as one of generating an interface to a knowledge editor that is utilized by an application expert. The components of the interface are determined by a task model developed from the method of skeletal plan refinement [Musen and Tu, 1991]. PROTG makes extensive use of graphical interaction modalities, such as graphical editors, which are especially well suited for capturing procedural knowledge (e.g. a flowchart diagram) Because the interfaces are based on the task model for the domain of interest, PROTG generated tools can ....

.... changing the ordering of rules) Our current research aim is to identify building blocks, called mechanisms, of a grain size finer than that of problem solving methods, that can be (1) combined to construct problem solving methods, and (2) applied to define the role of domain dependent knowledge [Tu et al. 1991]. Our approach is essentially empirical in that we hope to identify several of these mechanisms from the problem solving methods being applied in our current development of various medical expert systems. After the mechanisms are identified, we will test their applicability to other tasks and ....

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Tu, S., Shahar, Y., Dawes, J.,Winkles, J., Puerta, A., and Musen, M. 1991. A problem-solving model for episodic skeletal-plan refinement. In Proceedings of the Sixth Knowledge-Acquisition for Knowledge-Based Systems Workshop, ed. by Boose, J. H. and Gaines, B. R., Alberta, Canada, in press.

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S.W. Tu, Y. Shahar, J. Dawes, J. Winkles, A.R. Puerta and M.A. Musen, "A problem-solving model for episodic skeletal-plan refinement," Knowledge Acquisition, 4, 197--216 (1992).

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