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Cooper G, Rezgui Y, Hayes P, Jackson M,

Notification and change propagation support in aconcurrent, multi-actor environment

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Series: w78:1997 (browse)
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Cornick T, Noble B, Hallahan C

The Limitations of current Working practices on the development of Computer Integrated Modelling in Construction

Abstract: For the Construction Industry to improve its processes through the application computer-based systems, traditional working practices must first change to support the integrated control of design and construction. Current manual methods of practice accept the limitations of man to process a wide range of building performance and production information simultaneously. However when these limitations are removed, through the applications of computer systems, the constraints of manual methods need no longer apply. The first generation of computer applications to the Construction Industry merely model ed the divided and sequential processes of manual methods i.e drafting, specification writing, engineering and quantity calculations, estimating, billing, material ordering data-bases and activity planning. Use of these systems raises expectations that connections within the computer between the processes model led can actually be made and faster and more integrated information processing be achieved. "Linking" software is then developed. The end result of this approach was that users were able to produce. information faster, present it in an impressive manner but, in reality, no perceived improvement in actual building performance, production economy or efficiency was realised. A current government sponsored Teaching Company Programme with a UK design and build company is addressing the problem of how real economic benefit can be realised through improvement in, amongst other things, their existing computer applications. This work is being carried out by both considering an academic conceptual model of how "designing for production" can be achieved in computer applications and what is immediately realisable in practice by modeling the integration of a limited number of knowledge domains to which computers are already being app1ied.i.e. billing from design, estimating and buying. This paper describes each area of work and how they are impacting on each other.

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Class: class.economic (0.051898) class.impact (0.047946) class.environment (0.045258)
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Dai W, Oakes S

Knowledge-based code checking programfor building design

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Full text: content.pdf (102,033 bytes) (available to registered users only)

Series: w78:1997 (browse)
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Dawood N, Sriprasert E, Mallasi Z, Hobbs B

4D visualisation development: real life case studies

Abstract: Visual 4D planning and scheduling technique that combines 3D CAD models with construction activities (time) has proven benefits over traditional tools, such as bar charts and network diagrams. In 4D models, project participants can effectively visualise and analyse problems regarding sequential, spatial, and temporal aspects of construction schedules. As a consequence, more robust schedules can be generated and hence reduce reworks and improve productivity. Currently, there are several working research prototypes and commercial software that have ability to generate 4D model. However, two major issues arise regarding the current 4D development approaches and the use of commercial software. These are the limited feasibility to large and complex projects, and inflexibility to incorporate more construction problems (nD modelling) especially for process constraints such as spatial conflicts, and availability of information and resources. As a part of the VIRCON project, an EPSRC funded research, this paper introduces a pragmatic approach to develop extensible 4D visualisation using two real life case studies. ProVis, a 4D simulator, was developed using Visual Basic for Applications (VBA), accessing the integrated products and processes from the VIRCON database and produces 4D model in the AutoCAD environment. This 4D tool is also integrated with a Critical Space Analysis (CSA) tool (another VIRCON tool) and is able to visualise spatial overload of the construction site. The paper details 4D development process based on the proposed approach and discusses efforts spent to convert general project information (2D drawings and schedules) to 4D models. It is concerned that a little additional effort was needed to develop the extensible 4D model based on the proposed approach. In addition, no commercial 4D software was used to achieve the visualisation process.

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Full text: content.pdf (1,175,014 bytes) (available to registered users only)

Series: w78:2002 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.social (0.022151) class.processing (0.014982) class.software development (0.008395)
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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.


Dawson A D

The virtual building - the implications of its preparation during the design process

Abstract: This paper examines the impact of the preparation of the virtual building as an outcome of the design process. The implications for the design practitioner working in an environment in which a virtual building model is prepared and tested prior to commencement of construction are discussed. Changes to the current organisational structure of the design process are suggested if a move is to be made toward an integrated virtual building construction and performance modelling environment.

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Full text: content.pdf (78,531 bytes) (available to registered users only)

Series: w78:1999 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.environment (0.083308) class.impact (0.048539) class.analysis (0.024846)
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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.


de Vries B, van Leeuwen J P, Achten H H

Design studio of the future

Abstract: New communication media enable new design technologies. To investigate the mutual influenceof a new medium like Virtual Reality (VR) and architectural design technologies, a laboratorycalled 'the design studio of the future' is established. In due time a design system will bedeveloped offering different design technologies in an integrated environment. Interfaces withinVR will support various approaches to the design problem. A large research program (VirtualReality - Distributed Interactive Systems) is carried out to provide state-of-the-art tools fordesigners to experiment and to give feed back on the results.

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Full text: content.pdf (59,111 bytes) (available to registered users only)

Series: w78:1997 (browse)
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Debras P, Monceyron J L, Buckley E, Leonard D, Carpentier G, , Seifert L

The construction pilot in GENIAL: implementing the GEN vision in the construction domain

Abstract: Among the emerging range of new working habits that appear to best preserve companies position in competitive markets, the Global Engineering Network (GEN) Initiative has recognised the reuse of internal and external engineering knowledge as one of the very promising approach to be considered by companies elaborating their business strategies. With that respect, the GENIAL project devotes its mission to the promotion of a new king of market places where actors capture and retrieve on-line a wide range of engineering products and services. The GENIAL architecture is first depicted that emphasises its main components. The GENIAL approach is then described that allows a information provider to play as a Value Added Service Provider in the GENIAL sense. This approach is then illustrated by dedicated cases in the construction domain that evidenced the benefits of the concepts from a user point of view.

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Full text: content.pdf (327,190 bytes) (available to registered users only)

Series: w78:1998 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.roadmaps (0.022317) class.strategies (0.018025) class.commerce (0.013436)
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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.


Debras P, Zarl A, Amar V, Poyet P

The distributed information service in the VEGA project: an approach towards the harmonisation of STEP, SGML and EDIFACT informationstandards for the support of integrated and distributed construction projectinformation systems.

Abstract: Over the past two decades, the complexity of engineering projects has increased. In such a context, havingaccess to the right information at the right time is often crucial. In the area of Information Management,numerous efforts have already been made under the auspices of various major institutes towards theelaboration of Information Standards. Whether it be STEP for Product Data representation and exchange,SGML for documentation structuring and support or EDIFACT for Electronic Data Interchange, thesestandardisation efforts all address complementary aspects related to the representation and communication of engineering project information. However, both at the conceptual and technological levels, end-usersnowadays face a lack of integration among these various existing or emerging Information Standards.Building upon the on-going specification and implementation of a CORBA based middleware layer allowingthe distribution of any STEP SDAI models, the Distributed Information Service of the VEGA EuropeanEsprit Research project addresses the integration and distribution of construction project information systemsat two different levels. First, the conceptual level is concerned with the elaboration of STEP EXPRESSproduct data models supporting SGML documentary models and documents but also EDIFACT messagesmodels and messages. The implementation level is then concerned with the development of dedicatedconverters supporting the back and forth translation of SGML documents and EDIFACT messages towardsthe STEP format, finally providing a remote access to any kind of information for all the actors involved in a construction project.

Keywords: Distributed Information System, STEP, SGML, EDIFACT.

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Full text: content.pdf (131,579 bytes) (available to registered users only)

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Debras P

Construction application of a gen-network : uniform access to standards, products and company information

Abstract: "Facing an increasing competitive environment where flexibility and adaptability to change are the obliged route to success, building and construction companies have to continuously renew their working habits while keeping business processes under quality, time and cost control. In the Architecture, Engineering and Construction (AEC) domain, the wide diversity in terms of the object built, but also associated to the geographical dispersion of actors and building sites makes such an agility even more crucial. Considering the design and tendering phase of a construction operation, the architects and construction engineers have to efficiently select the manufactured products that will best suit the project while complying to its numerous constraints. Beyond the functionality, performance and cost characteristics, a suitable product has also to conform to the applying regulations and standards, be eventually accompanied with a corresponding technical agreement, offer acceptable delivery solutions on the building site. Moreover, once identified within a manufacturer catalogue, the product has to be integrated into the architect or engineer application desktop, whether it be a CAD, specification writer or quantity take-off application. Addressing these needs, the Global Engineering Networking (GEN) initiative is promoting the reuse of company internal and external engineering knowledge through the emergence of new kind of global market places where actors publish and retrieve on-line a wide range of engineering information and services. In particular, The Construction Pilot in EP 22 284 GENIAL project demonstrates over the AEC domain, the relevance of new generation of Information Technology infrastructures supporting the erection of Value-Added Service Provider (VASP) sites that materialise the GEN vision, i.e. allowing information and services to smoothly be retrieved where required whilst the succeeding company is concentrating on its core competencies. With such an infrastructure, whether it is through material, performances, manufacturer, regulation or price discrimination, the appropriate component, document or service is rapidly and cost effectively brought on the designer desk for the best value of the overall project. On the other side of the communication pipe, the supplying partner gains the opportunity of reaching an enlarged audience as IT now commonly break any geographical distance. In practice, three major information publishers and a building contractor in Europe initiate the GEN network in the AEC domain through the erection of VASP sites offering product, company or document related information. User queries are governed by various standard (EPIC, UNICLASS) or corpus specific (BATIBASE, EDIBATEC) classification systems. Relevance of the overall approach is demonstrated through the presentation of a large variety of such queries for the various information corpuses used : Techcom company and product information, BIC company, product and document, REEF regulation documentary corpus or EDIBATEC product information."

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Full text: content.pdf (748,881 bytes) (available to registered users only)

Series: w78:2000 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.legal (0.032376) class.retrieve (0.019963) class.roadmaps (0.012591)
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Permission to reproduce these documents have been graciously provided by Icelandic Building Research Institute. The assistance of the editor, Mr. Gudni Gudnason, is gratefully appreciated


Dupagne A, Mathus P

CABMaS (Computer Aided Building Management System) :Development of an integrated computerised platform for the management of information flows adapted to small and medium size building companies

Abstract: The basic objectives of the CABMaS research project (EC-DG XII, BRITE-EURAM II, CRAFT) had been the definition and the organisation of a computer platform aimed at managing the information flows needed by the various actors involved in the numerous stages of the building process, from the first contact with the client to the final compliance checking. Efforts have been made to produce a set of computerised tools easily manageable by non-IT specialised users, supporting these different processes and managing their associated information. The SME involved in the project has specialised in single-family house production. It was highly concerned with its quality management and already had the ISO 9000 certification. Wishing to further improve the quality of its production process, this SME asked an evaluation of its internal information flows management so that to develop an integrated, coherent computerised solution to improve it. Information flows management was considered by the research team as a significant source of knowledge that could be used by the company to improve its production process. The information had thus to be stored as a dynamic knowledge base, of successful (and unsuccessful) past experiences. This knowledge base consists in an actual management support system, integrating the information coming from the many sub-groups of the SME. Thanks to the structure of the information system, concrete experiences coming from the working-place can be exploited by company's commercials at the early stage of the process to guarantee coherence between the client needs and the enterprise capabilities. The computer platform in its state of development is presently used in the company every day practice.

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Full text: content.pdf (85,812 bytes) (available to registered users only)

Series: w78:1998 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.synthesis (0.020841) class.deployment (0.008502) class.standards (0.007280)
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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.


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