A telepresence environment for concurrent life-cycle design and construction

Construction projects normally involve transient 'virtual organisations', where a multidisciplinary project team works together on the design and construction of a facility. Many of these participants often work independently while taking decisions that inevitably affect others. The research described in the thesis involved examining the adoption of concurrent engineering (CE) principles by the construction industry as a way to reduce the problems posed by the fragmentation of the industry, and to enhance its competitiveness. An important aspect of concurrent engineering in construction is the need for effective communication of design information between all members of the project team and across all stages of the constructed facility's life-cycle. The thesis describes the development of a communications infrastructure for Concurrent Life-Cycle Design and Construction. [Continues.

Distributed IT for integration and communication of engineering information for collaborative building design

In recent years, the rapid development of new information technologies has significantly impacted on the product development process as strategic means to gain competitive advantage in a global market. In the engineering domain, powerful computer-based tools such as Computer Aided Design systems enable engineers to perform various design tasks and realise product concepts in the early phase of the product development process. However, the increasing complexity of modern products as well as the globalization of product development further necessitate distributed and collaborative design environments. This is where different computer systems and dispersed specialists in similar or different disciplines need to collaboratively be involved in shared design activities. Therefore, the integration and communication of engineering information are two of the most key technical factors in ensuring successful collaboration. The current application of information technology in supporting collaboration during the design process is limited to either a document-based or a common format-based exchange level. These methods provide relatively simple forms of collaboration compared with desired distributed and collaborative design environments that can deliver more effective ways of collaboration. The work detailed in this research investigates the advantages of using modern distributed information technologies alongside a suitable framework and a product model to support multi-disciplinary collaborative design. The work also involves exploring other important issues related to real-time collaborative design environments. These are design transaction management, access control, communication, and version management. The research work employs modern technology and distributed computing to enhance the processes of collaborative building design. The research proposes a framework and a product model to extend the functionalities of stand-alone and single-user design systems to facilitate synchronous collaborative design where distributed designers can work concurrently on a centralised shared model and carry out all necessary communication and data exchanges electronically. The implemented framework proposes a data transaction management approach that ensures efficient concurrent access to the model data and maintains data consistency. The framework also employs software agents to automatically access and operate on the information exchanged among the collaborators. The proposed product model in this work extends an adopted model to support access right control and version management. The work is implemented in an experimental software as a client-server model. .Net technology is used for implementing the framework and the product model and virtual reality technology is used to allow for intuitive interaction with the system. The research concludes that the utilisation of the modern distributed technologies can effectively induce change in the design process toward a more collaborative and concurrent design. As demonstrated within this work, these technologies with a suitable system design can meet the main requirements of a real-time collaborative building design system

Planning for strategic change in the project delivery strategy

For organizations such as state departments of transportation, other public agencies, or private companies, adopting a new approach to procure services for delivery of construction projects requires significant organizational changes; modifications to both their work processes and existing organizational structures may be needed. These adjustments, encompassing many different aspects of the organization's interests, must occur for the change initiative to be successfully put into practice. In this research, the adoption of integrated project delivery methods within the transportation project sector is investigated to better understand the dynamics of this change. In the context of this study, an Owner's project delivery strategy is defined as the set of project delivery methods that are adopted for delivering capital projects. This dissertation presents findings from a study of Public Owner organizations that have implemented the designbuild method for delivering highway projects. Using as a case study the new $1.3 billion SH-130 tolled expressway project in Central Texas, the author analyzed project documentation and conducted many interviews with individuals affiliated with owner, legal, engineering consultants, and contractors. Findings suggest that project representatives institutionalize practices and routines connected to the new approach by adapting to new challenges, rather than "overwriting" previously existing practices. Similarly, the institutionalization of innovative approaches to project delivery happens concurrently with a deinstitutionalization of the previous approaches. Building upon these findings, a conceptual framework is presented for helping Owner organizations implement change in their project delivery strategy. The proposed conceptual framework is based upon both existing published literature and interviews with managers involved in implementing a strategic change in project delivery strategy. This framework was further refined by making a comparative study of four transportation projects in the United States. In addition, a detailed implementation framework was validated and further developed through a Delphi study with representatives from several organizations whose major responsibilities and experiences include the management of change in procurement approach. Findings from these studies, including application to the construction industry and other industries are presented.Civil, Architectural, and Environmental Engineerin

Digital creativity - an investigation into architectural design in the electronic age

A dissertation submitted to the University of Bedfordshire in partial fulfilment of the requirements for the degree of Master of Philosophy.This study explores approaches to architectural creativity and collaborative design in the contemporary digital design context. The thesis identifies key trends and developments in the historical and present-day evolution of the creative use of computers by architects in education and practice. It examines the current manifestations of digitally supported architectural design, and investigates the ways in which computers and electronic communication technologies are being utilised in the design process. In the context of, and informed by, this investigative survey the author evolves three key models or analogues for the application of computer based techniques in the creative design process. Each design analogue has been tested with the collaboration of undergraduate architecture students and their academic teaching staff through experimental pedagogic design projects, which have been used to evaluate their validity and effectiveness. The working principles developed through these projects have also been applied in a realworld context, through a live professional case study architectural project undertaken by the author in commercial architectural practice. The concluding section examines the current state of play in the relationship between theoretical ideas and the practice of architectural design using digital techniques, to assess the methodological validity of the design analogues in the educational and practice spheres, and to make recommendations for future areas of research

An empirical study of the complexity of requirements management in construction projects

Purpose – The purpose of this paper is to investigate in-depth the current approach of managing client requirements in construction and to highlight the significant factors, which contribute to the complexity of managing the requirements in order to define a better approach. Design/methodology/approach – A case study of a leading international global built asset and engineering consultancy organization was conducted over two years. The case study was conducted principally using semi-participant observations supplemented with other qualitative data collection methods (i.e. interviews, questionnaires and document analysis). Thematic analysis was used to analyze the data. Findings – The results highlight major factors associated with the complexity of managing client requirements information, which include: mechanisms for documentation, storage and access, distribution of requirements information between stakeholders and across lifecycle phases of a project, traceability management and the provision of effective change management incorporating dependency checking and impact analysis. Research limitations/implications – The main limitation of the research is the use of an in-depth study of a single organization, which applied the same project management method across all the projects they managed. Further work is planned to develop the proposed framework fully, and develop a software platform to operationalize and evaluate its industrial applicability with construction projects. Practical implications – The implications of this research is that a better approach to managing requirements information is needed, which will facilitate the design, construction and operations of buildings within budget and time. An integrated framework and an associated tool are suggested to implement the approach. Originality/value – This study identifies major research gaps and problems in the architecture, engineering, construction and facilities management industry; proposes and presents Electronic Requirements Information Management framework to facilitate lifecycle management of the requirements

Developing a distributed electronic health-record store for India

The DIGHT project is addressing the problem of building a scalable and highly available information store for the Electronic Health Records (EHRs) of the over one billion citizens of India

Distributed IT for integration and communication of engineering information for collaborative building design

In recent years, the rapid development of new information technologies has significantly impacted on the product development process as strategic means to gain competitive advantage in a global market. In the engineering domain, powerful computer-based tools such as Computer Aided Design systems enable engineers to perform various design tasks and realise product concepts in the early phase of the product development process. However, the increasing complexity of modern products as well as the globalization of product development further necessitate distributed and collaborative design environments. This is where different computer systems and dispersed specialists in similar or different disciplines need to collaboratively be involved in shared design activities. Therefore, the integration and communication of engineering information are two of the most key technical factors in ensuring successful collaboration. The current application of information technology in supporting collaboration during the design process is limited to either a document-based or a common format-based exchange level. These methods provide relatively simple forms of collaboration compared with desired distributed and collaborative design environments that can deliver more effective ways of collaboration. The work detailed in this research investigates the advantages of using modern distributed information technologies alongside a suitable framework and a product model to support multi-disciplinary collaborative design. The work also involves exploring other important issues related to real-time collaborative design environments. These are design transaction management, access control, communication, and version management. The research work employs modern technology and distributed computing to enhance the processes of collaborative building design. The research proposes a framework and a product model to extend the functionalities of stand-alone and single-user design systems to facilitate synchronous collaborative design where distributed designers can work concurrently on a centralised shared model and carry out all necessary communication and data exchanges electronically. The implemented framework proposes a data transaction management approach that ensures efficient concurrent access to the model data and maintains data consistency. The framework also employs software agents to automatically access and operate on the information exchanged among the collaborators. The proposed product model in this work extends an adopted model to support access right control and version management. The work is implemented in an experimental software as a client-server model. .Net technology is used for implementing the framework and the product model and virtual reality technology is used to allow for intuitive interaction with the system. The research concludes that the utilisation of the modern distributed technologies can effectively induce change in the design process toward a more collaborative and concurrent design. As demonstrated within this work, these technologies with a suitable system design can meet the main requirements of a real-time collaborative building design system

IT Supported Construction Project Management Methodology Based on Process and Product Model and Quality Management

Computer Integrated Construction Project Management (CPM) supported by product and process models can be seen as a future type of integration structure facilitating the solution of various management problems in the fragmented Construction Industry. The key to success is directly correlated with the comprehensive integration of currently isolated IT applications. However, despite that a number of initiatives have been developed, no fully generic models have yet to be formally standardized. This topic has been the subject of intensive research during the last decades. In this thesis a Computer Integrated CPM approach, which is supported by IFC (Industry Foundation Classes) and ISO9001:2000 Quality Management System, is proposed. The main aim is to provide integration of product, process and organizational information to help achieve the interoperability of the involved actors and tools in a concurrent environment. According to implied requirements which are represented in the ‘state of the art’ section, the fundamental concepts are presented in two parts as: (1) realization of CPM in an IT concept and (2) formalization of IFC Views for software interoperability on the example of Bidding Preparation Phase. In order to realize a generic framework using a high-level process core model named Organizational Management Process (OMP) model, different aspects have been brought together into a consistent life cycle structure. These are: (1) a set of layered processes based on ISO procedural definitions, (2) software integration requirements based on Construction Management Phases, (3) application methods of the Procurement System and (4) Organizational data. This provides for synchronizing technical products, processes, documents, and actors in their inter-relationship. The framework is hierarchically structured in three layers Phases – Processes - Product data. The developed IT Management Processes (ITMP) which are used as a baseline for the IFC Views implementation are derived from the OMP. Moreover, in order to support completeness, a mapping structure between processes and scenarios based on the Procurement Systems was constituted. The representation of OMP and ITMP is provided by using the ARIS eEPC (extended event-driven process chain) modeling method. On the basis of a generalized representation of product data, a system-wide integration model for heterogeneous client applications which supports different CPM areas can be achieved. IFC Product Data Model integrates different domains thereby enabling coordination of bidding preparations. However, there is a need to realize individual model subsets. i.e. views of the product model. In this context, adaptable views were developed based on ITMP. The defined resources’ relevancies to IFC Objects are examined by realizing central information elements. These provide a mapping structure between process resources and IFC Classes. On that basis integration of process and product models can be accomplished. In order to realize IFC Views, IFC Concepts and IFC Instance Diagrams were developed based on IFC View Definition Format. The grouping of IFC Concepts enables the implementation of the adaptable IFC Views that are required for standardized system integration. This is achieved with the help of formal specification using the Generalized Subset Definition Schema. The validation has been made based on an alphanumerical comparison. The selected 3D full-model and the developed IFC View for Product Catalog models are compared in this context. There are two consequences observed. In the first case, which also addresses Unit Price Procurement systems, the desired results were obtained by filtering the required data. However, when the results were compared for Design & Build and Lump-sum Procurement Systems (contracts), an extension need was observed in the IFC Model. The solution is provided via formalization of cost data and material analysis information by an extension of IFC Concept namely ‘IfcConstructionResource’ with new classes and with new relations. Thereby a common information model based on the data schema of the IFC standard is constituted.Das von Produkt- und Prozessmodellen unterstützte computerintegrierte Bauprojektmanagement (CPM) kann als der zukünftige Typ der Integrationsstruktur angesehen werden, der die Lösung verschiedener Baumanagementprobleme in der fragmentierten Bauindustrie erleichtern kann. Der Schlüssel zum Erfolg steht in direkter Beziehung zu einer umfassenden Integration derzeit getrennter IT-Anwendungen. Trotz zahlreich entwickelter Ansätze, die zur Verfügung gestellt wurden, sind bisher noch keine vollständig generischen Modelle formell standardisiert worden, obwohl dies in den letzten Jahrzehnten ein Thema intensiver Forschung war. In dieser Promotionsschrift wird eine computerintegrierte CPM-Methode, die auf Basis der IFC (Industry Foundation Classes) und dem Qualitätsmanagement ISO 9001:2000 aufbaut, vorgeschlagen. Das Hauptziel besteht in der Schaffung der Integration von Produkt-, Prozess- und Organisationsinformationen, um die Interoperabilität der beteiligten Akteure und Tools in einer parallelen Umgebung erreichen zu können. Entsprechend den Anforderungen, die im Abschnitt „Stand der Technik“ aufgeführt sind, werden die vorgeschlagenen, grundlegenden Konzepte in zwei Bereiche aufgeteilt: (1) Umsetzung der CPM-Prozesse in ein IT-Konzept und (2) Formalisierung der IFC-Sichten für die Interoperabilität von Software, beispielhaft ausgeführt für die der Ausschreibungsphase. Um einen generischen Rahmen unter Verwendung eines hochrangigen Prozesskernmodells, das als organisatorischer Managementprozess (OMP) bezeichnet wird, zu realisieren, werden zuerst die verschiedenen Aspekte in einer konsistenten Lebenszyklenstruktur zusammengefügt. Diese sind: (1) eine Menge hierarchisch geschichteter Prozesse, erstellt auf der Grundlage der Verfahrensdefinitionen von ISO 9001, (2) die Softwareintegrationsanforderungen auf der Grundlage der Baumanagementphasen, (3) die Anwendungsmethoden des Beschaffungssystems und (4) die Organisationsdaten. Dadurch wird die Synchronisation der in Wechselbeziehung stehenden technischen Produkte, Prozesse, Dokumente und Akteure geschaffen. Das gesamte System ist hierarchisch in die drei Ebenen Phasen – Prozesse – Produktdaten strukturiert. Die entwickelten IT-Managementprozesse (ITMP), die als Grundlage für die IFC-Implementierungssichten dienen, werden aus dem OMP hergeleitet. Der Vollständigkeit halber, wird eine Abbildungsstruktur zwischen den Prozessen und den Szenarien, die die Beschaffungssysteme beschreiben, entwickelt. Die Darstellung der OMP und ITMP erfolgt unter Verwendung der erweiterten ereignisgesteuerten Prozessketten (eEPK) nach der ARIS-Modelliermethode. Auf der Grundlage einer verallgemeinerten Darstellung der Prozessdaten kann das systemweite Integrationsmodell für heterogene Client-Anwendungen, das verschiedene CPM-Bereiche unterstützt, erreicht werden. Das IFC-Produktdatenmodell integriert verschiedene Domänen und ermöglicht somit die Koordinierung der hier beispielhaft gewählten Ausschreibungsbearbeitungen. Hierzu ist es notwendig, Teilmodelle, d. h. Sichten des Produktmodells zu erzeugen. Entsprechend wurden anpassbare Sichten auf der Grundlage von ITMP entwickelt. Die Bedeutung der in diesem Zusammenhang identifizierten Informationsprozessressourcen in Bezug auf die IFC-Objekte wurde durch die Einführung zentraler Informationselemente, sog. IFC Concepts, untersucht. Diese stellen eine Abbildungsstruktur zwischen den Prozessressourcen und IFC-Klassen zur Verfügung. Auf dieser Grundlage konnte die Integration von Prozess- und Produktmodellen erreicht werden. Um die IFC-Sichten zu realisieren, wurden auf der Grundlage des IFC-Sichtendefinitionsformats IFC-Konzepte und IFC-Instanzendiagramme entwickelt. Die Gruppierung in IFC-Konzepten ermöglichte die Implementierung von anpassbaren IFC-Sichten, die für die standardisierte Systemintegration erforderlich sind. Diese wird mit Hilfe einer formellen Spezifikation unter Verwendung der verallgemeinerten Subset-Definitionsschema-Methode (GMSD) erreicht. Die Validierung erfolgte auf der Grundlage eines alphanumerischen Vergleichs, in dem ein ausgewähltes 3D-Produktmodell und die daraus entwickelte IFC-Sicht für das Produktkatalogmodell verglichen wurden. Es ergaben sich zwei Schlussfolgerungen. Im ersten Fall, der auch das Einheitspreisbeschaffungssystem betrifft, konnten die gewünschten Ergebnisse direkt durch Filterung der erforderlichen Daten erhalten werden. Beim Vergleich der Ergebnisse sowohl für Pauschal-, als auch für Entwurfs- und Baubeschaffungssysteme (Verträge) wurde jedoch festgestellt, dass für das IFC-Modell ein Erweiterungsbedarf besteht. Eine Lösung wurde über die Formalisierung der Kostendaten und Materialanalyseinformationen durch Erweiterung des IFC-Konzepts IfcBauRessource mit neuen Klassen und mit neuen Beziehungen erreicht. Somit erhält man ein allgemeines Informationsmodell auf der Grundlage des Datenschemas des IFC-Standards

Integrated lifecycle requirements information management in construction

Effective management of information about client requirements in construction projects lifecycle can contribute to high construction productivity; within budget and schedule, and improve the quality of built facilities and service delivery. Traditionally, requirements management has been focused at the early stages of the construction lifecycle process where elicited client requirements information is used as the basis for design. Management of client requirements does not extend to the later phases. Client requirements often evolve and change dramatically over a facility’s life. Changing client requirements is one of the principal factors that contribute to delays and budget overruns of construction projects. This results in claims, disputes and client dissatisfaction. The problems of current requirements management process also include: lack of integrated and collaborative working with requirements; lack of integrated requirements information flow between the various heterogeneous systems used in the lifecycle processes, and between the multiple stakeholders; inefficient and ineffective coordination of changes within the lifecycle processes; manual checking of dependencies between changing requirements to facilitate assessment of cost and time impact of changes. The aim of the research is to specify a better approach to requirements information management to help construction organisations reduce operational cost and time in product development and service delivery; whilst increasing performance and productivity, and realising high quality of built facilities. In order to achieve the aim and the formulated objectives, firstly, a detailed review of literature on related work was conducted. Secondly, the research designed, developed and conducted three case studies to investigate the state-of-the-art of managing client requirements information. A combination of multiple data collection methods was applied which included observations, interviews, focus group and questionnaires. Following this, the data was analysed and problems were identified; the necessity for a lifecycle approach to managing the requirements information emerged. (Continues...)

A distributed solution to software reuse

Reuse can be applied to all stages of the software lifecycle to enhance quality and to shorten time of completion for a project. During the phases of design and implementation are some examples of where reuse can be applied, but one frequent obstruction to development is the building of and the identifying of desirable components. This can be costly in the short term but an organisation can gain the profits of applying this scheme if they are seeking long-term goals. Web services are a recent development in distributed computing. This thesis combines the two research areas to produce a distributed solution to software reuse that displays the advantages of distributed computing within a reuse system. This resulted in a web application with access to web services that allowed two different formats of component to be inserted into a reuse repository. These components were searchable by keywords and the results are adjustable by the popularity of a component’s extraction from the system and by user ratings of it; this improved the accuracy of the search. This work displays the accuracy, usability, and speed of this system when tested with five undergraduate and five postgraduate students