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Flood I,Nowrouzian V

Construction process modelling: a constrained graphics approach versus conventional construction simulation

Abstract: Effective construction project planning and control requires the development of a model of the projectís construction processes. The Critical Path Method (CPM) is the most popular project modelling method in construction since it is relatively simple to use and reasonably versatile in terms of the range of processes it can represent. Several other modelling techniques have been developed over the years, each with their own advantages and disadvantages. Linear scheduling, for example, has been designed to provide highly insightful visual representations of a construction process, but unfortunately is largely incapable of representing non-repetitive construction work. Discrete-event simulation is generally agreed to be the most versatile of all modelling methods, but it lacks the simplicity in use of CPM and so has not been widely adopted in construction. A new graphical constraint-based method of modelling construction processes, Foresight, has been developed with the goal of offering the simplicity in use of CPM, the visual insight of linear scheduling, and the versatility of simulation. Earlier work has demonstrated the modelling versatility of Foresight. As part of a continuing study, this paper focuses on a comparison of the Foresight approach with discrete-event construction simulation methods, specifically Stroboscope (a derivative of CYCLONE). Foresight is shown to outperform Stroboscope in terms of the simplicity of the resultant models for a series of case studies involving a number of variants of an earthmoving operation and of a sewer tunnelling operation. A qualitative comparison of the two approaches also highlights the superior visual insight provided by Foresight over conventional simulation, an attribute essential to both the effective verification and optimization of a model.

Keywords: Construction process,Foresight,process modeling,construction simulation,Stroboscope,model complexity,visual insight

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Series: convr:2013 (browse)
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I Flood, V Nowrouzian

Foresight: Graphical Constraint-Based Modeling Versus Simulation

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Full text: content.pdf (166,713 bytes) (available to registered users only)

Series: w78:2012 (browse)
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Koivu T J

Future of Product Modeling and Knowledge sharing in the FM/AEC industry

Abstract: This paper describes a technology foresight study performed in co-operation with Stanford University (CIFE) and VTT Building and Transport. The main aim of the project is to provide information for decision-makers about the future of interoperability and product modeling. Information was collected about technologies and their use, conditions affecting the use of the technologies and development trends. The project had two main phases: state-of-the-art and scenario building. Different methods were used for collecting data for the state-of-the-art phase. A two-round Delphi survey complemented interviews and literary study. Scenario planning and technology roadmapping were used to formulate alternative pictures of how product modeling and use of interoperable software might affect the industry. The scenarios are based on two main forces seen as the ones most likely to shape the business environment: the adoption non-proprietary approach in developing software and the adoption of value-adding approach in providing services during the life cycle of facilities. Based on the survey and data, the most wanted scenario is identified as well as different roadmaps toward most wanted scenario.

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Full text: http://www.itcon.org/2002/9 (available to registered users only)

Series: itcon:2002 (browse)
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R.W. Amor

Technical Challenges for Integrated Design and Delivery Solutions

Abstract: Conceptually, the development of an extensible infrastructure for Integrated Design and Delivery Solutions (IDDS) would appear to be a straight-forward matter. However, there are few current implementations in existence, and the majority of those that do exist are bespoke developments which support a restricted number of processes and analyses. This paper characterizes the wide range of technical challenges which are faced by those delivering on the promise of integrated design and delivery solutions. It examines the levels of IT support that can be offered for aspects such as: collaborative work processes; repositories of integrated data; management of information integration; and knowledge management processes. Alongside each of these challenges it identifies current approaches to supporting IDDS, both at a commercial level with tools that can be deployed today, and from the viewpoint of researchers working on future improvements to the IDDS ideal. The last part of this paper establishes a technology foresight for the technical development of IDDS. Providing a view of the technical future of IDDS over the coming decades with projections of the pathways that will lead to adoption of various forms of IDDS and the major obstacles where the dearth of solutions will delay the uptake of IDDS.

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Full text: content.pdf (234,485 bytes) (available to registered users only)

Series: w78:2009 (browse)
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Walker D H T, Betts M

Information technology foresight:the future application of theworld wide web in construction

Abstract: Information technology (IT) is fundamentally changing global construction business. TheInternet, and more specifically the World Wide Web (WWW) will be key to this change.Forecasting technological change is notoriously difficult. This is becoming furtherexacerbated by the increasingly evident cycles of over-hype and disillusionment that newtechnologies and management paradigms face.Science policy research has developed innovative forecasting methods to deal with such aproblem. Key within these is the use of scenarios to describe the integrative effects ofdevelopments in parallel technologies and their socio-economic context.This paper contains a detailed scenario of the way the WWW may be used in globalconstruction in the year 2001. Analysis of the scenario causes key questions to be askedregarding the impact of technology development in construction. These questions are inneed of urgent, serious consideration by: governments, senior construction executives,educators, students, researchers, recruiters, and new entrants to the industry.The answers to these questions will help shape a key component of the research andinnovation agenda for construction for what is left of this millennium.

Keywords: Technology Foresight, Construction IT, Internet, World Wide Web.

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Full text: content.pdf (55,135 bytes) (available to registered users only)

Series: w78:1997 (browse)
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