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Froese T M, Yu K Q

Industry foundation class modeling for estimating and scheduling

Abstract: Industry Foundation Classes (IFCs) developed by the International Alliance for Interoperability (IAI) are general models of a building project that support project information sharing and exchange among different types of computer applications used in the project. The IFCs are developed based on the information requirements from industry processes. The Project Management Domain Committee of IAI's North America Chapter has developed process models of cost estimating, scheduling, and their integration for the purpose of generating the IFCs to support data sharing throughout estimating and scheduling applications. The goal of this paper is to present the models relevant to estimating and scheduling in the IFCs. The paper discusses various modelling issues covering subjects such as costs, construction processes, resources, products, and project documents for work plans and cost estimates.

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Full text: content.pdf (96,047 bytes) (available to registered users only)

Series: w78:1999 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.processing (0.070183) class.standards (0.028891) class.represent (0.025646)
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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.


Froese T, Fischer M, Grobler F, Ritzenthaler J, Yu K, Sutherland S, Staub S, Akinci B, Akbas R, Koo B, Barron A, Kunz J

Industry Foundation Classes for Project Management - A Trial Implementation

Abstract: An effort is underway to develop Industry Foundation Classes--industry-standard data structures for exchanging information about construction projects. In addition to physical information about buildings, these classes represent project management information such as estimating and scheduling data. Many core concepts relating to the project management portions of the Industry Foundation Classes have recently been added to these models, but these have received virtually no testing and implementation to date. A workshop was held to work through an implementation and evaluation exercise for these models. The results identified many areas for potential improvement, but also confirmed that the overall approach taken by the models worked well for representing and integrating product, work process, estimating, and scheduling information.

Keywords: International Alliance for Interoperability, IAI, Industry Foundation Classes, IFC, Project Management, Estimating, Scheduling, Project Modelling, Data Standards, Integration

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Full text: http://www.itcon.org/1999/2 (available to registered users only)

Series: itcon:1999 (browse)
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Froese T, Q YU K, Liston K, Fischer M

System architectures for AEC interoperability

Abstract: "This paper discusses several issues relating to computational system architectures to support interoperability among distributed, model-based AEC/FM applications. The approach is based on tiered layers where applications interact with local “Building Objects” software components that, in turn, interact with a variety of distributed data repository alternatives in a data layer. International Foundation Classes (IFCs) models are used as the primary data model in each of the layers and communication between layers uses several XML standards. One issue is an approach to multiple meta-models within the many components of a distributed system. IFCs focus on strongly-typed models that describe AEC concepts and objects in an explicit manner. One of the requirements for applications that implement IFCs is that they must understand the semantics of the IFCs and map the IFC models to the application internal application models. However, software applications used in AEC processes are not always based on an internal model that can be explicitly mapped to a strongly-typed model such as the IFCs at development stage. Instead, it is common that some of the applications are either purely generic without an explicitly defined domain schema, or generic enough so as they must deal with run-time databases whose schemas cannot be pre-defined during the development of the applications. In order to allow this type of software to share and exchange data with other applications through the models such as the IFCs, data schemas must be mapped at a higher and abstract level that allows for run-time model schema configurations and mappings. The Interactive Workspace for Project Management (IWPM) is a CIFE (Center for Facilities Engineering) project that integrates several research decision support systems, commercial project management systems, and advanced collaborative human-computer interaction approaches using emerging industry data standards and internet technologies. To illustrate an example of using the meta-model approach, the paper applies the use cases in IWPM to demonstrate how meta-models can be used to implement IFC project management related models in such an integrated software environment."

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Full text: content.pdf (595,267 bytes) (available to registered users only)

Series: w78:2000 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.represent (0.049095) class.standards (0.036666) class.communication (0.035658)
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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


Hung-Ming Chen, and Yu-Chin Lin

A Software Framework For Supporting Cluster-To-Cluster Computing On Large-Scale Structural Analysis Problems

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Full text: content.pdf (726,818 bytes) (available to registered users only)

Series: w78:2006 (browse)
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J P Zhang, Q Liu, F Q Yu, Z Z Hu, W Z Zhao

A Framework of Cloud-Computing-Based BIM Service for Building Lifecycle

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Full text: content.pdf (353,820 bytes) (available to registered users only)

Series: w78:2014 (browse)
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Lung-Chuang Wang, Yu-Cheng Lin, and P. H. Lin

Mobile Construction RFID-Based Supply Chain Management System

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Full text: content.pdf (834,724 bytes) (available to registered users only)

Series: w78:2006 (browse)
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M Yu Kononova & OG Nikonova

GIS - based DSS for sustainable infrastructures and management of tourism in the Leningrad Region

Abstract: The paper deals with analysis of a wide-sense role of GIS - based decision support system (DSS). Formalisation of approach towards preparation and realisation of visualisation of tourism infrastructure of Leningrad Region for ensuring stable development of territory is given. The meaning of the GIS -based DSS as a system-forming part of the geoecological account (monitoring, management and audit) of tourism infrastructure within the frame of monitoring area and territory is shown.

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Full text: content.pdf (444,463 bytes) (available to registered users only)

Series: w78:2005 (browse)
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Permission to reproduce these papers has been graciously provided by the Technische Universität Dresden.


Wix J, Yu K, Ottosen P S

The development of industry foundation classes for facilities management

Abstract: The Industry Foundation Classes (IFCs) are integrated object models of building projects developed by the International Alliance for Interoperability (IAI). The IFCs support data sharing and exchange between industry processes across multiple domains such as architecture, structural engineering, building services, construction and facilities management (FM).Maintenance management is one of the major functions in FM. It requires object information about building systems and components that are generated from different domain processes throughout different stages of the project development life cycle. Supported by the IFCs, this information can remain available until the building operation phase for maintenance processes to use. However, this information requirement must be defined based on detailed analysis of maintenance processes, and must be modeled using a formal modeling methodology, that is, the IFCs.This paper describes the current and proposed developments in facilities management in the IAI, particularly for maintenance. It also discusses a planning 'roadmap' that identifies discrete packages of information that support FM processes.The paper demonstrates a general maintenance process model developed to define the object requirements and interfaces for sharing maintenance information. Based on the process information analysis, the paper develops and presents a set of IFC object models that support the maintenance processes. Additionally, this paper discusses the necessities and capabilities of the IFC maintenance objects to access and utilize external information provided by various library resources.

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Full text: content.pdf (104,206 bytes) (available to registered users only)

Series: w78:1999 (browse)
Cluster: papers of the same cluster (result of machine made clusters)
Class: class.roadmaps (0.045742) class.processing (0.032397) class.standards (0.026452)
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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.


Yu Zhang, Alan Kwan, John Miles

Using generative representations for structural design

Abstract: Work in recent years has shown that topological reasoning with search algorithms using traditional rep-resentations such as parameters, ground structures, voxels, etc is very limiting. Each type of representation is only to be suitable for a limited number of topologies. This is restrictive because there are many problems where the topology of the solution is unknown except in the most general terms or there are competing topologies which are suitable for solv-ing a given problem. Hence, at best, choosing a representation technique can be difficult and at worst it can restrict the search so that a full examination of the problem is not possible. Also, as the available computational power increases and the technology of search algorithms is enhanced, the topologies being reasoned about become ever more complex and so the representations within the algorithms can become cumbersome. A possible solution to these difficulties is the use of generative geometries where the object is represented by a set of rules which describe how to create the object. These can, when correctly implemented, give a compact representation and one which can be handled within typical search algorithms like for example genetic algorithms. This paper looks at the use of L-systems. They are being applied to beam design problems although this paper focuses on the representation. As will be shown in the paper, although the representation has some attractions, there are also some difficulties with the implementation and especially with en-forcing constraints. The paper describes work which is in progress rather than a completed project.

Keywords: generative representation, evolutionary computation, structures, search algorithms

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Full text: content.pdf (333,992 bytes) (available to registered users only)

Series: w78:2007 (browse)
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Yu Zhang, Kai Wang, David Shaw, John Miles, Ian Parmee and Alan Kwan

Representation And Its Impact On Topological Search In Evolutionary Algorithms

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Full text: content.pdf (487,787 bytes) (available to registered users only)

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