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• W41393834 abstract "This report describes the development of an expert system shell for the preliminary phase (synthesis) o^engineering design. It is during this part of the design process that the creativity and experience of an engineer are mostly needed. The increasing complexity of engineering design problems has made synthesis a very difficult process, even to an experienced designer, if not approached in a structured and organized fashion. The proposed shell adopts principles of the morphological approach to design, incorporating heuristics in the form of design constraints. Assistant Professor Graduate Assistant Development Of An Expert System Shell For Engineering Design Mary Lou Maher and Panayiotis Longinos Design, a combination of art and science, is perhaps one of the most important and difficult tasks an engineer performs. During the last three decades, substantial activity has grown in studying design in an effort to produce a structured approach to this creative process. As a result, a number of design methodologies have been developed for a wide variety of applications and from the background of differing engineering disciplines. Although strong indications exist of the practical potential of these techniques for the engineering design process, the literature falls short in presenting detailed evidence of successful applications of design methodology. With the introduction of the computer as a powerful tool for the engineering design process, attention has shifted from pursuing study on design methodology to the development of software to aid engineers in the design process. Traditionally these aids have been limited to the well structured aspects of design such as analysis and graphics. Conventional programming techniques have been unable to automate the less formalized phases and thus adopt an overall design methodology. Today, the intuitive ability of the experienced engineer is still needed to make the decisions guided by the computational results. Advancements in Artificial Intelligence research and the subsequent emergence of expert systems provide a new powerful tool for the development of computer programs that can be used as aids for the solution of ill-structured phases of the engineering design process. Expert Systems are an ideal environment for studying design methodologies and learning more about the design process This report describes the development of an expert system shell for the preliminary -rase (synthesis) of engineering design. The proposed shell adopts principles of the morphoiog cat approach to design, incorporating heuristics in the form of design constraints. 3 Assistant Professor, Department of Civil Engineering Carnegie-Mellon University Pittsburgh. PA 15213 Graduate Assistant, Department of Civil Engineering Carnegie-Mellon University Pittsburgh, PA 15213 University Libraries Carnegie Mellon University Pittsburgh, Pennsylvania 15213 1. Motivation The preliminary phase of the engineering design process is learned only after years of experience in the field. The development of design methodologies has resulted in a number of promising but unproven techniques in approaching and organizing this unstructured phase of the design process. An expert system environment able to implement such a technique and thus formalize the preliminary design process can be a powerful tool in learning more about the engineering design process. Such a system can also introduce new engineers to the decisions made during the preliminary design process, something that is absent from todays formal engineering education. 2. Engineering Design Engineering design may be defined as a process in which scientific principles, technical information and creativity are all combined in order to produce an optimum end product which will serve its intended purpose. The engineering design process involves a number of distinctive phases beginning with the definition of a particular problem and ending with the selection of an optimum solution. Various approaches to engineering design have produced different decompositions of this process. Commonly, engineering design is broken into three main phases, as illustrated in Figure 2 1 PROBLEM DEFINITION SYNTHESIS" @default.
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• W41393834 title "Development of an expert system shell for engineering design" @default.
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