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A. Al-Bazi, N. Dawood & Z. Khan

Development of Hybrid Simulation and Genetic Algorithms System for Solving Complex Crew Allocation Problems

Abstract: This paper presents an innovative approach to solving complex crew allocation problems in any labour-intensive industry. This has been achieved by combining simulation with Genetic Algorithm (GA). The integrated system determines the least costly and most productive crews to be allocated on any produc-tion processes. Discrete Event Simulation methodology is used to simulate a manufacturing system. A special PROCESS module is developed to overcome limitation of the used simulation software that appears when us-ing normal PROCESS module. A concept of multi-layer chromosome is proposed to store different data sets in multi-layers structure. GA operators were developed to suit such chromosome structure. As a case study, a sleeper precast manufacturing system is chosen to prove the concept of the proposed allocation system. The results showed that adopting Manipulating a number of multi-skilled workers to be allocated among different production processes had a substantial impact on reducing total allocation cost, process-waiting time, and op-timising resource utilisation. 3D visualisation is presented.

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Series: w78:2009 (browse)
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A. Dikbas, P. Ercoskun & K. Ercoskun

Enabling Sustainability through SOA within the AEC/FM Domain

Abstract: Sustainability is one of the most important research topics for the Architecture/Engineering/Construction & Facility Management (AEC/FM) domain. Two basic factors which enable sustainability are the technology background and the acquisition capability of this technology to the end users – society. Sustainability requires state of the art technologies which reduce the negative impact of population and affiliation. Key aspects of such technology are; it should depend on renewable resources, without waste, cyclical, based on resource productivity rather than labor productivity, and should even be restorative in its effects on the biosphere. Theproblem is, today establishing such technology is not affordable for the average end user. Development, implication, and acquisition of such technologies takes reasonable time though signs from our earth warns usthat we have no more time. The problem itself contains a lot of interoperability challenges in Information Technology (IT), Process and Organizational levels. Although many governments deploy incentives to promote investments on sustainable technologies, money is not the only measure for the market penetration of a technology. A user oriented approach is developed and a proposal is made to elaborate on the problem as a whole within a reference process model. The model determines the key functions, mechanisms and controls, to enable the design and development of sustainable technologies and facilitate the acquisition of those technologies to the society. The process model basically focuses on the Facility Management processes and addresses many aspects of the problem including financial, legal, and ethical issues. The model benefits from Customer Relationship Management (CRM) solutions for construction sector from a previous research and promotes a Service Oriented Architecture (SOA) for tracking the lifetime of sustainable technologies. The model includes decision support functions for the design phase, marketing and competency functions for the implication and acquisition phase, and measurement and evaluation functions for the use phase. The preliminary solution includes business processes rather then IT solutions but interoperability solutions on the IT layer also have been discussed for sustainable development. The model is under development within the joint efforts of a EU funded FP6 project I3CON (Industrialised, Integrated, Intelligent Construction) and a PhD research. It is believed that the model would facilitate the widespread recognition of the requirement of a radical switch to the sustainable technologies.

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A. Gehre, P. Katranuschkov, R. J. Scherer

Managing virtual organization processes by semantic web ontologies

Abstract: Interoperability within Virtual Organisations (VOs) is still only weakly supported by IT frameworks. Whilst service level interoperability has made remarkable progress since the emergence and the rapid growth of SOA and Grid technology in the last years, business processes – which are the driving force of each VO – still suffer distinct conceptual gaps regarding their decomposition to technical transactions. There exists no detailed approach that would allow describing technical as well as business aspects in a coherent yet flexible and extensible way. This paper presents a newly developed semantic framework that targets this requirement. The conceptual background is followed by an introduction of the developed semantic web ontologies. Based on these definitions, dedicated Ontology Services as well as a set of related end-user applications facilitating semantic technology have been designed and implemented. They are presented in the second part of the paper. Reported are results from the EU project InteliGrid (IST-004664; 2004-2007).

Keywords: semantic web, ontologies, virtual organisation, process modelling, process management

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Series: w78:2007 (browse)
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A. Hryshchenko, K. Menze

A Comprehensive Vision on Cartography of EU And International Research Initiatives with RTD Gap Analysis in the Area of ICT for Energy Efficiency in Buildings

Abstract: This paper analyses the status of current researches in the area of Information and Communication Technologies (ICT) for the improvement of Energy Efficiency (EE) design and operation of buildings.Currently, research and technology developers focus on different domains and sub-domains in the area of EE, such as the integration of renewable energy sources and related monitoring, simulation, and management software. In order to improve harmonisation between different research and technology developments (RTD) including International and European research projects and scientific programs these activities need to be categorised and analysed. As a result of RTD gap analysis, the challenges, commonalities, deficits, and potentials for collaboration are identified contributing to the development of a “Scientific Road Map”. This paper focuses on development of a comprehensive vision on Cartography of recently completed, ongoing, and recently announced research European projects and International research initiatives for further implementation of its results in global vision of the REEB project [cf. http://www.ict-reeb.eu/index.html], and proposes a systematic categorization approach to identify gaps in the current research agenda in the area of IT for Energy in Buildings.Our RTD gap analysis is based on a qualitative categorization specifying common classification criteria.At the present, there are more than 270 projects worldwide were analysed, five Main Classification Categories (MCC) were developed.The proposed methodology should allow the identification of deficits of the related research activities within the specified (in T3.1, D3.1) categories.

Keywords: information and communication technologies, energy efficiency, research and developments, RTD, categorization, gap analysis

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Series: w78:2010 (browse)
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A. Mahdavi, A. Mohammadi, E. Kabir, L. Lambeva

An empirically-based approach toward user control action models in buildings

Abstract: In most buildings, occupants operate control devices such as windows, shades, luminaries, radiators, and fans to bring about desirable indoor environmental conditions. Knowledge of such user actions is crucial toward accu-rate prediction of building performance (energy use, indoor climate) and effective operation of building service sys-tems. This paper describes an effort to observe control-oriented occupant behavior in three office buildings in Austria. Thereby, user control actions as related to one or more of the building systems for ambient lighting, shading, window ventilation, and heating were monitored together with indoor and outdoor environmental parameters. The collected data is being analyzed to explore relationships between the kinds and frequency of the control actions and the magni-tude and dynamism of indoor and outdoor environmental changes. Moreover, implications of user actions for building performance (e.g. energy consumption) are studied.

Keywords: Building performance, facility management, action models, occupant behavior

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Series: w78:2007 (browse)
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A.K. Jallow, P. Demian, A.N. Baldwin & C.J. Anumba

BPM-driven Construction Client Requirements Change Management

Abstract: Changing client requirements is one of the principal factors that contribute to delays and budget overruns of construction projects which as a result causes claims, disputes and client dissatisfaction. Change management ensures that such changes are handled through a properly coordinated and controlled process and retained throughout the project life cycle. This paper presents an empirical study that investigated the potential for an automated process of managing changes to clients’ requirements in construction projects. An initial focus group meeting was set up as a preliminary study which was followed by two case studies. Participant observation was used to conduct the case studies during which technical documents were also reviewed. The results show that current requirements change management process lacks efficiency. The paper concludes that business process management (BPM) approach could be a solution to better manage the requirements change process

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Aaron Costin and Charles Eastman

Requirements for Ontology Development in the AECO Industry

Abstract: This paper presents and discusses the requirements needed for the development of ontologies in the Architecture, Engineering, Construction, and Operation (AECO) Industry. With the increase of information modeling for all aspects of a construction project with a variety of software tools and technologies, there has been a major need of communication and exchange of information. An approach to improve seamless information exchanges is the use of ontologies. One major benefit of using ontologies is that the information and knowledge defined in the ontologies can be shared across domains. However, to do so requires standardized rules and requirements in order to share and promote reuse at the domain level. Significantly, with the increased demand of ontologies in the AECO industry, there needs to be standardization and consensus in the development and use of the ontologies to ensure the seamless transfer of information as well as realizing the full benefits of ontologies.

Keywords: Ontology, Information Exchange, Semantics, Logic, Taxonomy, AECO Industry

DOI: https://doi.org/10.24928/JC3-2017/0149

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Ahmad Irshad, M. Hesham El Naggar, Akhtar Naeem Khan

Fixed Head Kinematic Pile Bending Moment: Artificial Neural Network Approach

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Series: w78:2006 (browse)
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Ahmed Laaroussi, Bruno Fičs, Rémi Vankeisbelckt, Julien Hans

Ontology-aided FMEA for construction products

Abstract: The goal of improving the quality and the maintenance of building products, and the will to integrate the sustainable development objectives led us to propose an original method based on the use and adaptation of the Failure Modes Effects and Criticality Analysis (FMEA). This method relies among others on ontology use. It facilitates the FMEA proceeding. This paper aims to introduce innovative software specifically developed to perform more easily FMEA on building components. This software takes advantages of a structured knowledge base and an inference rule engine that allow a complete and formal description of the product to be analysed and an exhaustive analysis of all failures (degradations) that may occur.

Keywords: FMEA, ontological approach, knowledge capitalisation, degradation analysis, construction product

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Ahmed V, Mahdjoubi L, Feng X, Leach M

The learning of CAD for construction: technical abilities or visual?

Abstract: The increasing demands of the construction industry for individuals with good IT skills add continuous pressures on higher education to improve their methods of teaching. CAD training, as an important part of IT training for construction students, is becoming an essential part of the curriculum in most built environment schools. However, general CAD training is mostly concerned with providing students with technical skills rather than the initial ability of spatial visualisation. Indeed, existing training methods of CAD applications, do not take into consideration students? learning styles, and the differences in their spatial visualisation abilities. Considering that CAD students need to perform various activities within CAD applications to develop an understanding of building concepts and components, their spatial visualisation abilities and their learning style, remain the main barriers. This paper identifies the learning strategies required to assist with the learning of 3D modelling and describes a new approach adopted to examine students' Special Visualisation Skills. The paper also describes innovative e-learning approaches developed to reinforce students' learning of 3D CAD, tracking their progress and highlighting qualitative measures of their effectiveness.

Keywords: 3D modelling, e-learning in construction, CAL, CAA

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Series: itaec:2004 (browse)
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