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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 designers’ 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.


Lownertz K, Tarandi V

Cad components

Abstract: CAD Components is a Swedish research and development project, which was finished 1994. It has resulted in a recommendation for how suppliers and other companies shall formalise the digital description of their products. Instead of using CAD system drawings to distribute components the CAD Components are defined in a neutral ASCII file. The components can have both graphics and alphanumeric information. In addition to a 30 description there are isometric 20 views fined to store a number of levels of detailing, to be used in different drawing scales. To make it possible to use components from the early design phase all the way to the use of the completed building, the components can be easily replaced by more precise supplier specific versions. For this reason each class of components has to have definition points and default rotation. The classification of the CAD Components is based upon the Swedish BSAB system.

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Full text: content.pdf (967,412 bytes) (available to registered users only)

Series: w78:1994 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.impact (0.014627) class.synthesis (0.010084) class.software development (0.010008)
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Permission to reproduce these papers has been graciously provided by VTT, Espoo, Finland.


Milton T

Media matters

Abstract: A cognitive explanation is offered 011 why media matters In designing. The explanation provides a conceptual frarrrework for distinguishing types of design tools.

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Full text: content.pdf (551,490 bytes) (available to registered users only)

Series: w78:1993 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.synthesis (0.049790) class.analysis (0.043624)
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Permission to reproduce these papers has been graciously provided by the National University of Singapore. The assistance of the editors, particularly Prof. Martin Betts, is gratefully appreciated.


Mommessin M, Cutting-Decelle A F, Dubois A M, Dubois J E

SYDOX/MATCOMP/XI: an information system adapted to the needs of construction actors

Abstract: This paper presents the SYDOX/MATCOMP/Xi French project, whose goal is to provide the construction actors with an IT-based, on-line aid for component specification and selection at different levels of the construction life cycle. We will describe the main features of the information systems (IS), then specific aspects addressed by the project. SYDOX is aimed at defining and demonstrating a prototype to access information about MATerials and COMPonents used in construction, implemented on a WWW server and focused on a restricted sub-part of construction products. We will present the work done: methodology for data structuring, structure of the IS, database structuring, user interface, use of scenarios (enabling a selection and an adaptation of the information retrieved, on the basis of a set of criteria commonly used by professionals), hypertext links towards a taxonomic structuring of the information, application to window and floor, and some perspectives for the IS.

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Full text: content.pdf (62,027 bytes) (available to registered users only)

Series: w78:1999 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.man-software (0.082411) class.retrieve (0.025832) class.represent (0.015533)
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Permission to reproduce these papers has been graciously provided by the Research Press of the National Research Council of Canada. The support of the editors, particularly Dr. Dana Vanier, is gratefully appreciated.


Nassar K M, Beliveau Y

Integration of parametric geometric modeling and construction simulation

Abstract: In early ages 'Designing' of a building could not be differentiated from 'building' it, since the Master Builder was also the designer. With the increased complexity of design, this arrangement changed. Currently designing a building and constructing it are two different tasks. The description of design is done using drawings, whether in 2 or 3 dimensions, while construction operations is usually described by means of construction schedules. Three-dimensional details of building assemblies are often used for describing the design details. If we can describe the building details parametrically with construction operations only, then we can save time in developing assembly details and improve constructability. This paper describes a new approach to store design description of assembly details as intelligent objects. Each of these objects represents a building assembly. These assemblies are linked to a database of networks, that generically describe how the assemblies are built/drawn (i.e. the components used and the geometric/construction operations). A prototype system EASYBUILD is introduced.

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Full text: content.pdf (226,142 bytes) (available to registered users only)

Series: w78:1999 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.economic (0.027330) class.analysis (0.012254) class.software development (0.007903)
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Permission to reproduce these papers has been graciously provided by the Research Press of the National Research Council of Canada. The support of the editors, particularly Dr. Dana Vanier, is gratefully appreciated.


Oinas M

The utilization of product model data in production and procurement planning

Abstract: A new way to perform quantity take offs in building construction has been introduced in a form of value engineering concept. Value engineering tools allow the user to model the building three dimensionally using CAD (Computer Aided Design) -interface and an expert system. Nowadays this product model information is used for cost estimation purposes only. This highly detailed and structurized information could be used in production and procurement planning too. Product model information is enhanced with production information by allocating methods and resources to appropriate construction activities. These activities will then be scheduled in the scheduling application. Importing this activity timing data back to our production planning system we can conclude the needs for the resources: what, how much, when and where they are needed. This paper presents an effective procedure to utilize highly detailed product model information for production and procurement planning purposes. Data warehouse concept is also introduced for analysing the procurement data for management purposes.

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Full text: content.pdf (212,952 bytes) (available to registered users only)

Series: w78:1998 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.synthesis (0.053255) class.analysis (0.020591) class.man-software (0.020464)
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Permission to reproduce these papers has been graciously provided by Royal Institute of Technology, Stockholm, Sweden. The assistance of the editors, Prof. Bo-Christer Björk and Dr. Adina Jägbeck, is gratefully appreciated.


P van Leeuwen J, Fridqvist S

On the management of sharing design knowledge

Abstract: This paper presents the approach and results of a research project that develops an environment for sharing design knowledge. The project implements a design modelling approach that allows designers to capture design concepts into formally defined typologies. With these, designers can build flexible design models and have full control over definitions and structures used to represent design concepts. The presented research project uses this dynamic modelling approach in the development of Design Knowledge Servers that function in a network to provide a distributed multi-user environment for sharing design knowledge. Such a network serves the requirements of collaborative design and is useful for other purposes, such as publication of formalised product datasheets. The paper briefly provides the background of the knowledge modelling approach underlying this project and describes the design and implementation issues of the Design Knowledge Servers and the services they provide.

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Full text: content.pdf (223,951 bytes) (available to registered users only)

Series: w78:2002 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.communication (0.035144) class.environment (0.028734) class.synthesis (0.022312)
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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.


Pena-Mora F, Soibelman L

A geographically distributed multi-reasoning mechanism for change negotiation management of large scale engineering systems

Abstract: In large scale engineering projects, no design process can perfectly forecast every aspect of detailed project conditions. Sometimes oversights, mistakes or changes in the design must be corrected, and sometimes completely external factors also force changes in the situation. The basis for most changes is some form of conflict. In addition, the negotiation of such conflicts frequently results in suboptimal, inefficient agreements leading negotiators to believe that they could have reached other settlements.This paper presents the preliminary results of a research that explores mechanisms to provide a model for this negotiation process and applies automated multi- reasoning and learning mechanisms to the same. The ultimate goal of this research is to provide negotiators with precedence information to help them reason in a co-operative way assisting in the effort to seek "all-gain" rather than "win-lose" solutions.

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Full text: content.pdf (1,408,825 bytes) (available to registered users only)

Series: w78:1996 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.deployment (0.022663) class.impact (0.021558) class.environment (0.013968)
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Permission to reproduce these papers has been graciously provided by the University of Ljubljana. The assistance of the editor, Prof. Ziga Turk, is gratefully appreciated.


Pols A J

A generic approach to the modeling of buildings, focussing on the representation of productstructure

Abstract: An approach to the modeling of buildings is presented, focussing on the invariables in the representation of the building as a complex object, composed of spaces, assemblies of building elements and materials. The general infor- mationarchitecture includes: functional and technical specification, the deter- mination of form and dimensions, determination of productstructure, cost and performance estimation and the transformation of productstructure into building operations. The emphasis is on the representation of the productstructure of buildings from different viewpoints and in different phases. Within the productstructure a distinction is made between spatial structure and "material structure", the way materials, components and assemblies are combined into the endproduct as a whole. This leads to a semantic network with various hierarchies of abstraction, allowing for an integration of top-down and bottom-up approaches in various stages of the design process and a combination of generic and specific represen- tations of components, assemblies and productstructure. Related issues of datastructuring and -modeling and variational and combina- torial design are discussed on the basis of a prototypical appIication: an assembly consisting of doors and windows, their frames, wall openings, wall and loadbearing structure. The application involves a hybrid object-oriented DBMS, Tornado.

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Full text: content.pdf (1,830,587 bytes) (available to registered users only)

Series: w78:1988 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.man-software (0.027011) class.software development (0.018568) class.analysis (0.011956)
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Permission to reproduce these documents has been graciously provided by the Lund University and the Swedish Building Centre. The assistance of the editors, Prof. Per Christiansson and Prof. Henry Karlsson, is gratefully appreciated.


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