Cumincad : CUMINCAD Papers : Search Results

CumInCAD is a Cumulative Index about publications in Computer Aided Architectural Design
supported by the sibling associations ACADIA, CAADRIA, eCAADe, SIGraDi, ASCAAD and CAAD futures

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_id	1a52
authors	Amor, R., Augenbroe, G., Hosking, J., Rombouts and W., Grundy, J.
year	1995
title	Directions in modelling environments
source	Automation in Construction 4 (3) (1995) pp. 173-187
summary	Schema definition is a vital component in the computerised A/E/C projects. existing tools to manage this task are limited both in terms of the scope Of problems they can tackle and their integration with each other. This paper describes a global modellling and development environment for large modelling projects. This environment provides a total solution from initial design of schemas to validation, manipulation arid navigation through final models. A major benefit of the described system is the ability to provide multiple views of evolving schemas (or models) in both graphical and textual forms This allows modellers to visualise their schemas and instance models either textually or graphically as desired. The system automatically maintains the Conisistency of the informalion in these views even when modifications are made in other views. Simple and intuitive view navigation methods allow required information to he rapidly accessed. The environment supports strict checking of model instances and schemas in one of the major ISO-standardised modelling languages no used in product data technology. Ill this paper we show how such a modelling environment has been constructed for evaluation in the JOULE founded COMBINE project.
keywords	Modelling Environment; Consistency; Multiple Views: Views; Building Models; Information Management; Integrated System; Product Modelling
series	journal paper
email
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 14:33

_id	00e7
authors	Bushby, S.T.
year	1997
title	BACnetTM: a standard communication infrastructure for intelligent buildings
source	Automation in Construction 6 (5-6) (1997) pp. 529-540
summary	Intelligent buildings require integration of a variety of computer-based building automation and control system products that are usually made by different manufacturers. The exchange of information among these devices is critical to the successful operation of the building systems. Proprietary approaches to providing this communication have created great challenges for system integrators and hampered the development of intelligent building technology. Even though digital automation and control technology has been widely available for more than a decade and islands of automation are common, intelligent buildings with integrated building services are still more of a promise than a reality. BACnetTM is a standard communication protocol for building automation and control networks developed by the American Society of Heating, Refrigerating and Air-conditioning Engineers (ASHRAE, Standard 135-1995: BACnetTM--A Data Communication Protocol for Building Automation and Control Networks. American Society of Heating, Refrigerating, and Air-conditioning Engineers. Atlanta, Georgia, USA, 1995). BACnetTM provides the communication infrastructure needed to integrate products made by different vendors and to integrate building services that are now independent. This paper describes the main features of the BACnetTM protocol and early experience implementing it.
series	journal paper
more	http://www.elsevier.com/locate/autcon
last changed	2003/05/15 21:22

_id	a79b
authors	Junge, Richard and Liebich, Thomas
year	1995
title	New Generation CAD in an Integrated Design Environment: A Path towards Multi-Agent Collaboration
source	Sixth International Conference on Computer-Aided Architectural Design Futures [ISBN 9971-62-423-0] Singapore, 24-26 September 1995, pp. 277-290
summary	Product Modeling is considered to be an established concept not only for semantically based data exchange, but also for the specification of models, dealing with specific application requirements. The product model approach is regarded to be one step towards a new generation of Computer Aided Architectural Design, and to provide underlying means for enabling communication between different applications on a semantic level. After on overview about the background and the basis principles of product modeling, the authors discuss how product models can be used in commercial developments and in applied research projects.
keywords	Product Modeling, STEP, Computer-Aided Design, Data Integration
series	CAAD Futures
last changed	1999/08/03 17:16

_id	c675
authors	Kim, Inham
year	1995
title	Design Tools Integration in an Integrated Design Environment
source	Computing in Design - Enabling, Capturing and Sharing Ideas [ACADIA Conference Proceedings / ISBN 1-880250-04-7] University of Washington (Seattle, Washington / USA) October 19-22, 1995, pp. 75-95
doi	https://doi.org/10.52842/conf.acadia.1995.075
summary	The design problem has a multi-disciplinary nature and the design itself evolves as solutions are attempted by the designer. To support inter-disciplinary communication of design concepts and decisions, the integration of relevant CAAD tools is essential. Based upon a large set of design criteria and all corresponding knowledge, with the help of computer aided design tools, the result could be highly effective and novel. The integration of CAAD tools should be performed on the basis of generating better solutions by enabling designers to manipulate and appraise various solutions quickly and with a minimum of effort. The proposed system provides the foundations for a seamless and continuous working environment for architects and building engineers through a data modelling module, an integrated data management framework and various design tools. In the environment, stand-alone design tools can be plugged-in in order to access information stored in central databases. The suggested data modelling module helps integrated CAAD systems represent and exchange domain dependent design information at a semantic level, such as exchanging components and features of a building rather than graphical primitives. The suggested data management framework supports the straight-forward mechanisms for controlling the data representation through the inter-connected modules and design tools.
series	ACADIA
last changed	2022/06/07 07:52

_id	7cc1
authors	Kowal, Slawomir
year	1995
title	CAD Users Integration – A Current Problem
source	CAD Space [Proceedings of the III International Conference Computer in Architectural Design] Bialystock 27-29 April 1995, pp. 93-103
summary	In just about every field of human activities, actions which cover the design processes and the development of "a product", demand the participation of people presenting different professions and specialization. Designers using CAD techniques, usually apply different programs and even computer systems. This means that quite a large number of different applications, realising various elementary tasks, may be used during architectural design process. Very seldom data generated by a single designer, may be used by another one presenting a different specialization and using a different program. As each one of them makes a lot of changes during the design process, the need for a free exchange of the computer generated data may be seen easily. Hitherto proposed solutions of the integration of CAD systems users may be qualified in two following groups: 1.) Those based on a single integrated CAD system; 2.) Those based on a neutral data transfer format.
series	plCAD
last changed	2000/01/24 10:08

_id	3b58
authors	Morozumi, M., Murakami, Y. and Iki, K.
year	1995
title	Network Based Group Work CAD for UNIX Workstation
source	Sixth International Conference on Computer-Aided Architectural Design Futures [ISBN 9971-62-423-0] Singapore, 24-26 September 1995, pp. 637-646
summary	This paper discusses a model of collaborative process of architectural design and a network based group work CAD to support them. In the first part, the authors introduce a prototype system they developed to improve the environment for synchronous (interactive) design communication. Reviewing the process Of students' collaborative work that used the system, the authors point out that the frequent and timely exchange of CAD data with the system could not only stimulate designer's' imagination but accelerate the process of design development.
keywords	Collaboration, Groupwork, CAD, Design Process, Network
series	CAAD Futures
email
last changed	2003/05/16 20:58

_id	d3e0
authors	Vries, B. de and Somers, L.J.
year	1995
title	Message exchange in the building industry
source	Automation in Construction 4 (2) (1995) pp. 91-100
summary	A process model is described for exchanging information in the building industry. In this model participants send and receive messages. On receipt of a message an activity is executed if all required information is available. Otherwise a message will be sent to another participant to obtain the missing information. After execution of an activity a reply is sent with the desired data. In a building project an agreement is defined with all activities that will be executed by each of the participants. An executable implementation of the process model is built in ExSpect. In ExSpect the message exchange process can be simulated and analyzed for a specific building project.
keywords	Process Model
series	journal paper
email
more	http://www.elsevier.com/locate/autcon
last changed	2003/06/02 09:37

_id	6b82
authors	Week, David
year	1995
title	The Database Revisited: Beyond the Container Metaphor
source	Computing in Design - Enabling, Capturing and Sharing Ideas [ACADIA Conference Proceedings / ISBN 1-880250-04-7] University of Washington (Seattle, Washington / USA) October 19-22, 1995, pp. 53-70
doi	https://doi.org/10.52842/conf.acadia.1995.053
summary	The growth of international networks, and of international trade in general, has increased the opportunities for architects to work together over distance. In our practice at Pacific Architecture, we’ve been using first modems, and now the Internet, to connect co-workers at sites in Australia, Oregon, Scotland, and Papua New Guinea. Design collaboration has been primarily through the e-mail exchange of text and drawings. We’ve also assessed other CMC tools. Products like Timbuktu and video-conferencing software allow for real-time collaboration, based on the metaphor of two (or more) people together at a table, able to see and hear each other, and to work together on the same document. Groupware make intragroup communication the basis for building a workgroup’s knowledgebase. On recent projects, we’ve begun using database software as the basis for collaborative design communication. We’ve taken as a model for data structure Christopher Alexander’s ‘pattern language’ schema. Conversations about the design take the form of a collaborative construction of the language. Inputs into the database are constrained by the ‘pattern’ format. The CAD drawings run in parallel, as an ‘expression’ or ‘instance’ of the language. So far, CAD and database do not have an integrated interface. This paper describes our experience in these projects. It also outlines a set of design criteria for an integrated CAD/database environment economically and incrementally achievable within the constraints of currently available software. Formulating such criteria requires the reconceptualisation of notions of ‘database’. This paper looks at these notions through philosophical and linguistic work on metaphor. In conclusion, the paper analyses the way in which we can use a reframed notion of database to create a useful collaborative communication environment, centred on the architectural drawing.
series	ACADIA
last changed	2022/06/07 07:58

_id	4bf6
authors	Akin, O. and Lin, C.
year	1995
title	Design Protocol data and novel design decisions
source	Design Studies, 16 (#2, April), 211-236
summary	This work is a part of The Delft Protocols Workshop which is an international gathering of experts on design research. The objective is to study the behaviours of designers using techniques of cognitive psychology in general and protocol analysis in particular. The purpose of this paper is to explore the relationship between visual-graphic data processing and novel design ideas. Several analyses dealing with verbal-conceptual and visual-graphic data have been conducted; and the relationships between design activities and design decisions have been explored. The findings indicate that phases of the design process and the activities correlate with key design decisions.
series	journal paper
email
last changed	2003/04/23 15:14

_id	a927
authors	Amirante, Isabella and Bosco, Antonio
year	1995
title	Hypertext Between Research and Teaching: An Experience in a Didactic Building Technology Laboratory
source	Multimedia and Architectural Disciplines [Proceedings of the 13th European Conference on Education in Computer Aided Architectural Design in Europe / ISBN 0-9523687-1-4] Palermo (Italy) 16-18 November 1995, pp. 3-12
doi	https://doi.org/10.52842/conf.ecaade.1995.003
summary	IPER (hypertext for the knowledge of building patrimony) is the result of a research developed with C.N.R. (National Research Institute). The aim of IPER is to provide the knowledge, the description and the management of one or more historical buildings for public or private institutions. IPER allowed us to improve our methodology of building analysis, covering various disciplinary fields, in two different systems. (1.) the first one, synthetic and suitable for a group of historical buildings, (2.) the second one, complex and particularly made for monumental buildings. // This experience is related to the new regulation of teaching architecture in Italy made in 1993. The main novelty is the introduction of the laboratories with the contemporary presence of two or three teachers of different disciplines, working together with the students on the same project with different approaches. This opportunity allowed us to introduce the "knowledge engineer" as a teacher in the laboratory of building technology. IPER is given to the students with the aim of experimenting and solving the theoretical and practical difficulties that students of different years may encounter in the knowledge and representation of buildings and in the organisation of all the data from the case study.
series	eCAADe
more	http://dpce.ing.unipa.it/Webshare/Wwwroot/ecaade95/Pag_1.htm
last changed	2022/06/07 07:54

_id	8378
authors	Arlati, Ezio
year	1995
title	Patriarch: A Hypermedia Environment for the Support of Architectural Design
source	Multimedia and Architectural Disciplines [Proceedings of the 13th European Conference on Education in Computer Aided Architectural Design in Europe / ISBN 0-9523687-1-4] Palermo (Italy) 16-18 November 1995, pp. 187-198
doi	https://doi.org/10.52842/conf.ecaade.1995.187
summary	This paper reports on current research in the field of architectural design and knowledge- based systems, through the conception and implementation of two software tools operating as a part of an integrated hypermedia environment denominated PatriArch. Main concern of this set of tools operating in PatriArch is the support of design since the very beginning, in that phase of not yet correctly explored or interpretated constraints and of scarcely specified goals, in which an initial solution model - provisionally composed of fragments of supposed fitting ideas - for the design theme has to take place. The creative activity of the designer is assumed as an 'intentional planning activity' that represents the acquired level of knowledge of the network of connections defining the nature, function, shape in the space etc. of the increasingly integrated solution-model: the final design will be an evolution of this - and other competitive and concurrent - models. PatriArch is meant to be the environment containing and allowing the representation of this evolution through its ability of linking the fragments of designers' knowledge, supported by an integrated relational data base: Sysinfo. These works were conceived inside an educational software development program for architecture students.
series	eCAADe
more	http://dpce.ing.unipa.it/Webshare/Wwwroot/ecaade95/Pag_25.htm
last changed	2022/06/07 07:54

_id	2a49
authors	Asanowicz, Aleksander
year	1995
title	Multimedia Versus Ugliness of the City
source	Multimedia and Architectural Disciplines [Proceedings of the 13th European Conference on Education in Computer Aided Architectural Design in Europe / ISBN 0-9523687-1-4] Palermo (Italy) 16-18 November 1995, pp. 389-394
doi	https://doi.org/10.52842/conf.ecaade.1995.389
summary	This paper presents a method of using multimedia techniques in order to solve problems of visual pollution of city environment. It is our observation that human - inducted degradation of city environmental results not only from neglect and vandalism but also from well - intentioned but inappropriate preservation actions by uninformed designers and local administrations. Very often, a local municipality administration permit to erect an ugly, bad-fitting surroundings houses. It is usually connected with lack of informations about certain areas of a city, its features, characteristic and about present and earlier buildings. Therefore there was an experiment - a complex programme aiding the decision process as a part of the CAMUS system (Computer Aided Management of Urban Structure) which is created at Faculty of Architecture TUB. One of the integral parts of it is a block, which has been called "How would it be like to be nice around". One of the basic elements of that system is a town data base consisting of the independent knowledge - based systems, working together in a distributed computing environment. City administration will have access to each information from multimedia data-base. Multimedia is also having and impact on the effectiveness of decision process in urban planning and in our fight with ugliness of the city.
series	eCAADe
email
more	http://dpce.ing.unipa.it/Webshare/Wwwroot/ecaade95/Pag_46.htm
last changed	2022/06/07 07:54

_id	e100
authors	Bermudez, Julio and King, Kevin
year	1995
title	Architecture in Digital Space: Actual and Potential Markets
source	Computing in Design - Enabling, Capturing and Sharing Ideas [ACADIA Conference Proceedings / ISBN 1-880250-04-7] University of Washington (Seattle, Washington / USA) October 19-22, 1995, pp. 405-423
doi	https://doi.org/10.52842/conf.acadia.1995.405
summary	As both the skepticism and 'hype' surrounding electronic environments vanish under the weight of ever increasing power, knowledge, and use of information technologies, the architectural profession must prepare for significant expansion of its professional services. To address the issue, this paper offers a survey of the professional services architects and designers do and may provide in digital space, and who the potential clients are. The survey was conducted by interviews with software developers, gaming companies, programmers, investigators, practicing architects, faculty, etc. It also included reviews of actual software products and literary research of conference proceedings, journals, books and newspapers (i.e. articles, classified ads, etc.). The actual and potential markets include gaming and entertainment developments, art installations, educational applications, and research. These markets provide architects the opportunity to participate in the design of 3D gaming environments, educational software, architecture for public experience and entertainment, data representation, cyberspace and virtual reality studies, and other digital services which will be required for this new world. We will demonstrate that although the rapidly growing digital market may be seen by some to be non-architectural and thus irrelevant to our profession, it actually represents great opportunities for growth and development. Digital environments will not replace the built environment as a major architectural market, but they will significantly complement it, thus strengthening the entire architectural profession.
series	ACADIA
email
last changed	2022/06/07 07:52

_id	0459
authors	Brown, G.Z., Kline, J. and Sekigitchi, T.
year	1995
title	Infrared Professor - Design Phase
source	Sixth International Conference on Computer-Aided Architectural Design Futures [ISBN 9971-62-423-0] Singapore, 24-26 September 1995, pp. 103-112
summary	This paper describes diagnostic and advising modules that are being added to existing energy analysis software. The diagnostic module helps users understand whatís causing their building to have certain energy use characteristics by juxtaposing performance data with climate and building use data. The advisor is a rule-based expert system which tells the user what to do to improve the energy performance of their building design.
keywords	Advisor, Architectural Design, Buildings, Energy, Expert System
series	CAAD Futures
last changed	1999/08/03 17:16

_id	6378
authors	Burry, M., Prentice, R. and Wood, P.
year	1995
title	Walking Before Running: A Prelude to Multimedia Construction Information
source	Multimedia and Architectural Disciplines [Proceedings of the 13th European Conference on Education in Computer Aided Architectural Design in Europe / ISBN 0-9523687-1-4] Palermo (Italy) 16-18 November 1995, pp. 257-266
doi	https://doi.org/10.52842/conf.ecaade.1995.257
summary	An inherent problem with creating a multimedia application is generating the mass of information needed in order for it to be comprehensively useful. This is especially true when the subject is building construction for which any informative resource must cover the whole range of the material within its scope from the outset rather than merely be a sampler. Construction studies involve a large and diverse range of ´generic´ or ´model solutions´ which, in an ideal learning situation, are placed in context with historical and contemporary examples to aid a sense of critical evaluation. An obstacle, then, against creating resources dealing with detailed design is the risk that if it is not completed in its entirely there is no useful outcome. This paper also describes the problems and solutions involved in treating this material as data in a generic format so that its future usefulness is not compromised by current needs. It also outlines the programmes written to streamline an otherwise unwieldy process and deal with the inevitable non-conforming output from the participants.
series	eCAADe
more	http://dpce.ing.unipa.it/Webshare/Wwwroot/ecaade95/Pag_31.htm
last changed	2022/06/07 07:54

_id	ff05
authors	Butelski, Kazimierz
year	1995
title	A Brief Note on Virtual Space
source	CAD Space [Proceedings of the III International Conference Computer in Architectural Design] Bialystock 27-29 April 1995, pp. 83-92
summary	In its efforts to represent space, and then create architecture on the basis of this representation, humanity has taken three major steps. STEP 1. Representation of space in the form of a drawing or model; representations compared to the mental vision and then redrawn or remodelled, until the vision takes the shape of a finished building. This technology of design" followed different conventions, depending on the epoch. In the Middle Ages the method of approximation by triangles was introduced. The Renaissance used Projection, Elevation and Cross-Section. In order to construct a building, a flat, abstract representation is used, supplemented by a model showing spatial relations and a verbal description, impossible to convey graphically. STEP 2. Methods as in Step 1, but, beginning in the 1970s, with the use of computers, which allows also for the gradual integration of these methods in one program. Theoretically speaking, all necessary data can be now recorded, visualized, animated, etc., on a PC class computer. The design-aid software is based on the method of creating a 3D model of the whole building, and then generating the rest (projections, cross-sections) from it. STEP 3. The above step have - brought us to near- perfection in photorealistic representation of space, which remains, however only a 2D abstraction from 3D space. The next step, which is now taking place before (and in?) our very eyes, is to use systems which bring us directly into 3D space.
series	plCAD
last changed	2000/01/24 10:08

_id	05f7
authors	Carrara, G., Confessore, G., Fioravanti, A. and Novembri, G.
year	1995
title	Multimedia and Knowledge-Based Computer-Aided Architectural Design
source	Multimedia and Architectural Disciplines [Proceedings of the 13th European Conference on Education in Computer Aided Architectural Design in Europe / ISBN 0-9523687-1-4] Palermo (Italy) 16-18 November 1995, pp. 323-330
doi	https://doi.org/10.52842/conf.ecaade.1995.323
summary	It appears by now fairly accepted to many researchers in the field of the Computer Aided Architectural Design that the way to realize support tools for these aims is by means of the realization of Knowledge Based Assistants. This kind of computer programs, based on the knowledge engineering, finds their power and efficaciousness by their knowledge base. Nowadays this kind of tools is leaving the research world and it appears evident that the common graphic interfaces and the modalities of dialogue between the architect and the computer, are inadequate to support the exchange of information that the use of these tools requires. The use of the knowledge bases furthermore, presupposes that the conceptual model of the building realized by others, must be made entirely understandable to the architect. The CAAD Laboratory has carried out a system software prototype based on Knowledge Engineering in the field of hospital buildings. In order to overcome the limit of software systems based on usual Knowledge Engineering, by improving architect-computer interaction, at CAAD Lab it is refining building model introducing into the knowledge base two complementary each other methodologies: the conceptual clustering and multimedia technics. This research will make it possible for architects navigate consciously through the domain of the knowledge base already implemented.
series	eCAADe
more	http://dpce.ing.unipa.it/Webshare/Wwwroot/ecaade95/Pag_39.htm
last changed	2022/06/07 07:55

_id	7a20
id	7a20
authors	Carrara, G., Fioravanti, A.
year	2002
title	SHARED SPACE’ AND ‘PUBLIC SPACE’ DIALECTICS IN COLLABORATIVE ARCHITECTURAL DESIGN.
source	Proceedings of Collaborative Decision-Support Systems Focus Symposium, 30th July, 2002; under the auspices of InterSymp-2002, 14° International Conference on Systems Research, Informatics and Cybernetics, 2002, Baden-Baden, pg. 27-44.
summary	The present paper describes on-going research on Collaborative Design. The proposed model, the resulting system and its implementation refer mainly to architectural and building design in the modes and forms in which it is carried on in advanced design firms. The model may actually be used effectively also in other environments. The research simultaneously pursues an integrated model of the: a) structure of the networked architectural design process (operators, activities, phases and resources); b) required knowledge (distributed and functional to the operators and the process phases). The article focuses on the first aspect of the model: the relationship that exists among the various ‘actors’ in the design process (according to the STEP-ISO definition, Wix, 1997) during the various stages of its development (McKinney and Fischer, 1998). In Collaborative Design support systems this aspect touches on a number of different problems: database structure, homogeneity of the knowledge bases, the creation of knowledge bases (Galle, 1995), the representation of the IT datum (Carrara et al., 1994; Pohl and Myers, 1994; Papamichael et al., 1996; Rosenmann and Gero, 1996; Eastman et al., 1997; Eastman, 1998; Kim, et al., 1997; Kavakli, 2001). Decision-making support and the relationship between ‘private’ design space (involving the decisions of the individual design team) and the ‘shared’ design space (involving the decisions of all the design teams, Zang and Norman, 1994) are the specific topic of the present article. Decisions taken in the ‘private design space’ of the design team or ‘actor’ are closely related to the type of support that can be provided by a Collaborative Design system: automatic checks performed by activating procedures and methods, reporting of 'local' conflicts, methods and knowledge for the resolution of ‘local’ conflicts, creation of new IT objects/ building components, who the objects must refer to (the ‘owner’), 'situated' aspects (Gero and Reffat, 2001) of the IT objects/building components. Decisions taken in the ‘shared design space’ involve aspects that are typical of networked design and that are partially present in the ‘private’ design space. Cross-checking, reporting of ‘global’ conflicts to all those concerned, even those who are unaware they are concerned, methods for their resolution, the modification of data structure and interface according to the actors interacting with it and the design phase, the definition of a 'dominus' for every IT object (i.e. the decision-maker, according to the design phase and the creation of the object). All this is made possible both by the model for representing the building (Carrara and Fioravanti, 2001), and by the type of IT representation of the individual building components, using the methods and techniques of Knowledge Engineering through a structured set of Knowledge Bases, Inference Engines and Databases. The aim is to develop suitable tools for supporting integrated Process/Product design activity by means of a effective and innovative representation of building entities (technical components, constraints, methods) in order to manage and resolve conflicts generated during the design activity.
keywords	Collaborative Design, Architectural Design, Distributed Knowledge Bases, ‘Situated’ Object, Process/Product Model, Private/Shared ‘Design Space’, Conflict Reduction.
series	other
type	symposium
email
last changed	2005/03/30 16:25

_id	6279
id	6279
authors	Carrara, G.; Fioravanti, A.
year	2002
title	Private Space' and ‘Shared Space’ Dialectics in Collaborative Architectural Design
source	InterSymp 2002 - 14th International Conference on Systems Research, Informatics and Cybernetics (July 29 - August 3, 2002), pp 28-44.
summary	The present paper describes on-going research on Collaborative Design. The proposed model, the resulting system and its implementation refer mainly to architectural and building design in the modes and forms in which it is carried on in advanced design firms. The model may actually be used effectively also in other environments. The research simultaneously pursues an integrated model of the: a) structure of the networked architectural design process (operators, activities, phases and resources); b) required knowledge (distributed and functional to the operators and the process phases). The article focuses on the first aspect of the model: the relationship that exists among the various ‘actors’ in the design process (according to the STEP-ISO definition, Wix, 1997) during the various stages of its development (McKinney and Fischer, 1998). In Collaborative Design support systems this aspect touches on a number of different problems: database structure, homogeneity of the knowledge bases, the creation of knowledge bases (Galle, 1995), the representation of the IT datum (Carrara et al., 1994; Pohl and Myers, 1994; Papamichael et al., 1996; Rosenmann and Gero, 1996; Eastman et al., 1997; Eastman, 1998; Kim, et al., 1997; Kavakli, 2001). Decision-making support and the relationship between ‘private’ design space (involving the decisions of the individual design team) and the ‘shared’ design space (involving the decisions of all the design teams, Zang and Norman, 1994) are the specific topic of the present article. Decisions taken in the ‘private design space’ of the design team or ‘actor’ are closely related to the type of support that can be provided by a Collaborative Design system: automatic checks performed by activating procedures and methods, reporting of 'local' conflicts, methods and knowledge for the resolution of ‘local’ conflicts, creation of new IT objects/ building components, who the objects must refer to (the ‘owner’), 'situated' aspects (Gero and Reffat, 2001) of the IT objects/building components. Decisions taken in the ‘shared design space’ involve aspects that are typical of networked design and that are partially present in the ‘private’ design space. Cross-checking, reporting of ‘global’ conflicts to all those concerned, even those who are unaware they are concerned, methods for their resolution, the modification of data structure and interface according to the actors interacting with it and the design phase, the definition of a 'dominus' for every IT object (i.e. the decision-maker, according to the design phase and the creation of the object). All this is made possible both by the model for representing the building (Carrara and Fioravanti, 2001), and by the type of IT representation of the individual building components, using the methods and techniques of Knowledge Engineering through a structured set of Knowledge Bases, Inference Engines and Databases. The aim is to develop suitable tools for supporting integrated Process/Product design activity by means of a effective and innovative representation of building entities (technical components, constraints, methods) in order to manage and resolve conflicts generated during the design activity.
keywords	Collaborative Design, Architectural Design, Distributed Knowledge Bases, ‘Situated’ Object, Process/Product Model, Private/Shared ‘Design Space’, Conflict Reduction.
series	other
type	symposium
email
last changed	2012/12/04 07:53

_id	bf5f
authors	Chen, Xiangping
year	1995
title	Representation, Evaluation and Edition of Feature-based and Constraint- based Design
source	Purdue University
summary	This thesis investigates a general and systematic approach to feature-based and constraint-based design. We combine feature-based design and constraint-based design by globally decomposing a design into a sequence of feature attachments and locally defining and positioning each feature by constraints. Analogous to the concept of high-level programming languages, we formalize a layered design model that eliminates the dependency of a design representation on a solid modeler. With this design model, design intent, such as feature descriptions and constraints, is stored in an unevaluated, modeler-independent design representation while the geometry to which it corresponds is stored in an evaluated, modeler-dependent design representation. The separation essentially relies on a naming and matching schema that converts between a geometric reference and a generic name, and a design compiler that automatically instantiates the unevaluated design representation to an evaluated design representation with respect to a solid modeler. The geometric references for defining feature attributes and constraints are recorded with their generic names in the unevaluated design representation. We propose several techniques for naming geometric entities unambiguously. The design compilation or instantiation involves remapping a generic name back to a geometric reference in the selected geometric modeler, solving constraints and implementing feature operations or attachments. Instead of developing a constraint solver for this design compiler, we use an independent and general solver. Feature attachment operations are different from classical Boolean operations in solid modeling. However, we provide a semantics for them that is based on existing operations in solid modeling. The layered design model allows users to edit archived conceptual designs to derive new designs quickly. We investigate the coordination of later features in the unevaluated and modeler-independent representation when a feature is edited and provide a method for editing feature-based and constraint-based design. We also discuss how to extend this work to a commercial feature-based and constraint-based CAD system.
series	thesis:PhD
last changed	2003/02/12 22:37

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