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Johansson P, Popova M

Case-based Design Using Weakly Structured Information

Abstract: Over 50% of the work done by the designer on a day-to-day basis is routine design that consists of reusing past design solutions (Moore, 1993). Despite of this fact, there are no tools that rationally support reuse of such solutions. Case-based design (CBD) has been pointed out as a promising aid to help this situation. In order to be of practical use, however, a case-based design system has to be able to use the information that the designer creates during the design process. The design information that the designer creates is today mostly in the form of weakly structured information, e.g. text documents, calculation documents, and 2D-drawings. This paper proposes an approach that enables capturing and representation of weakly structured information for the purpose of case-based structural design. The representation proposed allows us to apply most of the objectoriented abstract principles also on weakly structured information. It is also shown how the conceptual framework, the dependency structure, and the design process can be captured, represented, and used in CBD. The approach is successfully implemented into a prototype for reuse of computerized design calculation documents.

Keywords: case-based reasoning, design, structural design, representation, object orientation, weakly structured information

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Full text: http://www.itcon.org/2002/2 (available to registered users only)

Series: itcon:2002 (browse)
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Lindgren H, Popova M, Johansson P

Case-based reasoning and information structures in collaborative design:the use of product models for information evolution

Abstract: The objective of our research project is to build up further knowledge about some aspects of the rational application of IT within collaborative design. We intend to integrate the platforms of case-based reasoning and information structures. Therefore, we especially concentrate on the integration of techniques in the form of professional applications: CAD-tools, word processors, and general applications and the World Wide Web, on one hand, and standards for the AEC industry: standardized product models such as IFC, national classification systems i.e. BSAB, on the other. A neutral format facilitating this integration has been found in XML dealing with both structured and weakly structured data produced and needed in design and construction projects. We focus on the designersí information needs and discuss a [PJ1] prototype of an everyday tool based on product- model and process-model technology. The most important role of this tool will be to promote efficient and flexible information management through case-based reasoning i.e. search, retrieval, storage, and reuse of information. If this process is made more effective, preferably automatic, it will motivate the design team to store valuable information concerning the whole lifecycle of an artefact. Through the use of standardized product models, this information will be sharable and suitable for the purpose of future reuse and feedback. The more often the design information is reused, the more general and adaptable it becomes and first then the designers will be able to state that they have achieved information evolution. This scenario requires, though, strengthening of the quality in the design office: a quality system for evaluating the information before it is stored for reuse, consequent use of standardized product models and IT. Only then the designers will become successful producers, re-users, and providers of information and will consolidate their position in the construction sector.

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Full text: content.pdf (448,355 bytes) (available to registered users only)

Series: w78:2001 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.communication (0.046025) class.represent (0.041965) class.processing (0.040744)
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Permission to reproduce these documents have been graciously provided by CSIR Building and Construction Technology. The assistance of the editors, Mr. Gustav Coetzee and Mr. Frances Boshoff, is gratefully appreciated.


Lindgren H, Popova M

The architect's database

Abstract: Architectural design deals with issues of widely varying nature: aesthetical and spatial issues, detailing, material choice and systems design, having a strong impact on the cost of operation, repair and maintenance. Information technology in construction industry provides new possibilities of reusing design solutions thus supporting some aspects of the design process. The main purpose of our project is to investigate methods for structuring the information related to architectural work in order to support the process of reusing design solutions. An equally important task is the development of a concrete application of a comprehensive archive of components in an object-oriented relational database. The basics of the architectural work are shortly discussed and an outline of a database called a Kit of design parts is presented. Also, a comment on multimedia as a way of integrating the various kinds of information needed in an architect's database is made. Finally, the conclusion is drawn that informution technology will be one of the most important challenges facing the architect's profession during the years to come. Nevertheless tools like the Kit of d. p . will become vital tools that will help the professional to fulfil the new requirements.

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Full text: content.pdf (1,755,430 bytes) (available to registered users only)

Series: w78:1994 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.environment (0.030582) class.impact (0.029780) class.software development (0.022621)
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Permission to reproduce these papers has been graciously provided by VTT, Espoo, Finland.


Popova M, Johansson P, Lindgren H

An integrated platform for case-based design

Abstract: This paper investigates methods for information management through the rational application of IT within design. Empirical knowledge plays a significant role in the human reasoning process since previous experiences help in understanding and solving new problems. Therefore, we intent to integrate the platforms of case-based reasoning (CBR) and information structures into an information management system for case-based design (CBD). In order to be of practical use, a CBD-system ought to handle all kinds of information created and used during the design process. Although the significance of standard product models is largely recognized today, heterogeneous weakly structured information e.g. construction briefs, calculation documents, 2D-drawings, and raw data: images, audio and video data, is still necessary in a CBD-system. We combine existing techniques (CAD-tools, word processors, WWW, etc.) and standards (IFC, XML, etc.) into a prototype of a tool for supporting the activities of architects and structural engineers. Structured information is represented by IFC; XML manages weakly structured information, while WWW deals with raw data. In this way, the heterogeneous information used in design can be managed and reused and CBD-systems can become a natural and valuable tool for designers.

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Full text: content.pdf (813,740 bytes) (available to registered users only)

Series: w78:2002 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.standards (0.090244) class.represent (0.085789) class.software-software (0.021536)
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Permission to reproduce these documents have been graciously provided by the Aarhus School of Architecture, Denmark. The assistnace of the editor, Prof. Kristian Agger, is gratefully aprecciated.


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