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Iosifidis P, Tah J H M, Howes R

Utilising product models for information sharing in an integrated cad environment

Abstract: Despite the extensive use of computing technology within the Architecture, Engineering and Construction (AEC) industry during the past few years, the crucial issue of information sharing amongst AEC participants still remains to be addressed. This results in poor building project co-ordination and affects productivity and final outcome. Our objective at South Bank University is to develop integrated CAD systems that utilise conceptual building product models for efficient building-related data representation and exchange. This paper presents our approach in defining a building product model of CAD- related design (i. e. architectural, structural, etc.) that also identifies overlapping sections with non-design data (i. e. project planning, cost estimating, etc.) which are incorporated for producing enriched data specifications extracted from CAD drawings and used by various AEC disciplines. Different strategies for separating multiple-views of the resulting data are also discussed Finally, a prototype system (MicroLink) that runs under Intergraph's MicroStation PC CAD package is presented. The system operates on a partial set of entities of the overall product model and produces semantically-enhanced design data in a declarative form ready for use by knowledge-based systems for automatic construction activity generation.

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Full text: content.pdf (1,686,055 bytes) (available to registered users only)

Series: w78:1994 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.store (0.031229) class.synthesis (0.029459) class.environment (0.021922)
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Permission to reproduce these papers has been graciously provided by VTT, Espoo, Finland.


Iosifidis P, Tah J H M, Howes R

An advanced object-oriented architecture for Information exchange through shared objects

Abstract: Despite the extensive use of computing technology within the Architecture, Engineering and Conshction (AEC) industry during the past few years, the crucial issue of information sharing amongst AEC participants still remains to be addressed This results in poor building project co-ordinution and affects productivity and finul outcome. This paper presents the use of collaborative object databases for efficient data exchange between direrent AEC applications. Fundamental to this work is the development of an integrated product model that represents the information requirements for total project design and construction The deployment of the Integrated Building Product Model (IBPM) as the basis for schema generation is also explained The system architecture demonstrates the ability to dynamically interchange objects between applications, which is being utilised as the means of automatic project plan generation from semantically enhanced CAD data. The system is aimed toward compliance to ISO-STEP for facilitating the exchange of information between dissimilar systems.

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Full text: content.pdf (952,198 bytes) (available to registered users only)

Series: w78:1995 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.communication (0.033232) class.software development (0.027177) class.represent (0.023656)
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Permission to reproduce these papers has been graciously provided by the Stanford University, USA. The support of the editors, particularly Prof. Fischer is gratefully appreciated.


J H M Tah, W Zhou

Towards Affordable BIM Adoption in Extended Construction Supply Chains

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Full text: content.pdf (341,079 bytes) (available to registered users only)

Series: w78:2013 (browse)
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Tah J H M, Carr V

How do small and medium-sized consultancy practices perceive information technology in the new economy?

Abstract: Information Technology (IT) is very much an enabler, and there are many perceived benefits from its successful implementation within an organisation, including time savings, reduced waste, better information exchange, and even cost savings. However, the rapid changes taking place in this area are potentially problematic for the many small businesses involved in what is essentially a very fragmented construction industry. A series of five recent workshops, held at South Bank University in collaboration with the Construction Industry Council, the Department of the Environment, Transport and Regions, and the Information Technology Construction Best Practice programme, aimed to deal with this issue, and to solicit the opinions of those most closely involved. Attendees were invited from a number of professions, including engineers, architects, building surveyors, and quantity surveyors, all of whom were from consultancy practices which can be considered to be small and medium-sized enterprises (SME) within the construction industry. The IT knowledge of the attendees varied from novices who realised their computing skills were lacking, to IT managers and directors whose knowledge of systems and support issues was considerable. Presentations were made on the future of IT within the construction industry, and by professionals with considerable experience of implementing IT strategies in construction organisations. The ensuing discussions covered many areas of concern, including: the problems and difficulties associated with implementing a successful IT strategy within a construction SME; the merits and flaws of moving away from document-driven models to a data-repository-driven central project model; the potential for E-commerce and the use of the Internet within construction; the rise of construction web portals, and the use of web-based collaboration; problems and concerns associated with interoperability and standards within the construction software domain; and the role of other technologies, such as virtual reality, within the industry. There were many concerns from the attendees regarding the current use of IT in construction. It was generally seen as something which was necessary – even vital – to the success of organisations, but many felt that, as a consequence, they were being forced to deal with issues which shouldn’t exist ideally (such as the lack of computer-aided drawing (CAD) standards, and the multiple vendors in the CAD software market.) Also, some felt that they were being pushed down IT routes they wouldn’t have previously considered due to the requirements of clients. Indeed, a number of attendees felt that something which was sold as being greatly beneficial to many organisations seemed to consume vast quantities of resources in some cases, yet there was still very much a feeling of a need to ‘be in there.’ Details of the demographics of the attendees are presented, and the subjects of greatest concern during the discussions are detailed thoroughly. The paper aims to provide a snapshot of the IT concerns of SMEs in the construction industry as it enters the 21st century.

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Full text: content.pdf (174,541 bytes) (available to registered users only)

Series: w78:2001 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.collaboration (0.069301) class.economic (0.044484) class.communication (0.037222)
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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.


Tah J H M, Howes R, Carr V

Towards a case-based reasoning framework for construction projectplanning and control

Abstract: The work presented in this paper is aimed at investigating the extent to which both 'user andsystem decision-making' in construction project planning and control can be captured andstored for future use. This paper presents work being conducted to establish a frameworkfor the application of CBR to construction planning and control. Due to the highvariability in the type, size, and complexity of construction projects the work concentrateson the use of the technique for information re-use in project planning and control forhighway bridge construction. Object models for a bridge and its components have beendeveloped, and used to develop a prototype application, CBRidge. The application takesbridge information from databases and adds it to cases bases which can then be used forcase matching. Once a suitable case has been found it can be adapted to more closelymatch the new project, and following this the adapted case can be linked to a planningmodel, enabling the plan for the matched case to be adapted for use with the currentproject. It concludes by discussing the benefits of the approach and the limitations of thesystem, together with future directions.

Keywords: construction planning, bridges, object modelling, databases, case-basedreasoning.

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Full text: content.pdf (211,048 bytes) (available to registered users only)

Series: w78:1997 (browse)
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Tah J H M

Object-oriented models for integrated intelligent project management

Abstract: Current project management systems are too abstract and do not have a means of representing concrete knowledge about a problem domain. Previous research in this area has failed to address larger problem domains to a level of success significant enough to make an impact in the construction industry. Object-orientation appears to provide a powerful means of encapsulating knowledge in intelligent object classes and together with the product modelling approach promise to provide a solution for larger problem domians. This paper presents selected object models that have evolved from research work aimed at investigating new approaches to the provision of knowledge-based decision support within large integrated project management systems. The work utilises the object modelling approach to software engineering and is precipitating in what may potentially progress from foundation classes to software components for project management. The continual re-use and development of such classes and components will evolve standard application information requirements that can contribute towards ISO-STEPs efforts in developing application protocols and standards for data exchange and interoperability.

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Full text: content.pdf (60,646 bytes) (available to registered users only)

Series: w78:1996 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.software development (0.052835) class.environment (0.031749) class.impact (0.030916)
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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.


Zhou W,Tah J,Heesom D

A distributed virtual reality application framework for collaborative construction planning using Bimserver

Abstract: As the architecture/engineering/construction (AEC) industry proceeds in the direction of digitalisation, computer supported collaborative work (CSCW) enhanced by building information modelling (BIM) becomes realistic for multidisciplinary collaboration in construction. Networked virtual reality (VR) supported by BIM servers, though showing great potentials in connecting multidisciplinary teamwork, is still less clarified for geographically dispersed construction teams to achieve collaboration. Taking the advantages of networked VR through the BIM server connection, this paper discusses a BIMserver-based VR application framework for distributed teams to perform real-time collaborative 4D construction planning and simulation. Through the analysis of current 4D modelling approaches, BIMserver adoption for collaborative 4D planning, as well as enabled VR platform technologies, the paper highlights availabilities of the interactive definition method for collaborative 4D planning underpinned by BIMserver. This method supports CSCW activities like co-navigate, so-sort, co-plan, co-simulate and co-talk for the 4D planning teamwork, together with power wall based semi-immersive VR platform for accommodating group users. On the basis of these discussions, a BIM-VR groupware system named Co-Studio is depicted from system architecture and application features. These discussions lay a foundation to develop a full functioned Co-Studio system as a next step. The system’s applicability will be verified and validated in its subsequent implementation and industry projects.

Keywords: BIMserver,collaborative 4D planning,groupware,virtual reality

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Full text: content.pdf (474,554 bytes) (available to registered users only)

Series: convr:2013 (browse)
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