@inproceedings{KellerAntoniadisMenzel2004, author = {Keller, Martin and Antoniadis, George and Menzel, Karsten}, title = {Resource Management for the Construction Industry}, doi = {10.25643/bauhaus-universitaet.167}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1679}, year = {2004}, abstract = {The management of resources is an essential task in each construction company. Today, ERP systems and e-Business systems are available to assist construction companies to efficiently organise the allocation of their personnel and equipment within the company, but they cannot provide the company with the idle resources for every single task that has to be performed during a construction project. Therefore, companies should have an alternative solution to better exploit expensive resources and compensate their fixed costs, but also have them available at the right time for their own business activities. This paper outlines the approach taken by the EU funded project "e-Sharing" (IST-2001-33325) to support resource management between construction companies. It will describe requirements for the management of construction resources, its core features, and the integration approach. Therefore, we will outline the approach of an integrated resource type model supporting the management and classification of construction equipment, construction tasks and qualification profiles. The development is based on a cross-domain analysis and evaluation of existing models. ...}, subject = {Baubetrieb}, language = {en} } @inproceedings{KoenigKlingerBerkhahn2004, author = {K{\"o}nig, Markus and Klinger, Axel and Berkhahn, Volker}, title = {Structural Correctness of Planning Processes in Building Engineering}, doi = {10.25643/bauhaus-universitaet.169}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1690}, year = {2004}, abstract = {The planning of projects in building engineering is a complex process which is characterized by a dynamical composition and many modifications during the definition and execution time of processes. For a computer-aided and network-based cooperation a formal description of the planning process is necessary. In the research project "Relational Process Modelling in Cooperative Building Planning" a process model is described by three parts: an organizational structure with participants, a building structure with states and a process structure with activities. This research project is part of the priority program 1103 "Network-Based Cooperative Planning Processes in Structural Engineering" promoted by the German Research Foundation (DFG). Planning processes in civil engineering can be described by workflow graphs. The process structure describes the logical planning process and can be formally defined by a bipartite graph. This structure consists of activities, transitions and relationships between activities and transitions. In order to minimize errors at execution time of a planning process a consistent and structurally correct process model must be guaranteed. This contribution considers the concept and the algorithms for checking the consistency and the correctness of the process structure.}, subject = {Baubetrieb}, language = {de} } @inproceedings{Palm2004, author = {Palm, Johan}, title = {Integrated Engineering Workflow focused on the Structural Engineering in the Industrial Environment}, doi = {10.25643/bauhaus-universitaet.162}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1625}, year = {2004}, abstract = {The engineering and construction industry has been slow to exploit the full potential of information technology. The industry is highly fragmented, price sensitive, risk-adverse, and profit margins are small. Each project is unique with a small amount of technological innovation opportunities to capitalise on from one project to the next. Technological innovations that have been taking place are just simulating the old traditional paper workflow. Engineering information in digital form is being conveyed using traditional paper representations, which have to be interpreted by humans before the information can be used in other applications, thereby creating 'islands of information'. It can be seen that poorly implemented IT strategies are duplicating paperwork, rather than reducing or eliminating it (Crowley et al., 2000). This paper will introduce the Integrated Engineering Workflow (IEW) concept to re-organise a structural discipline working on multi-disciplinary projects so as to maximise the advantages offered by new information technology.}, subject = {Baubetrieb}, language = {en} } @inproceedings{BiltchoukPahl2004, author = {Biltchouk, Irina and Pahl, Peter Jan}, title = {Interaction of Data Bases and Graphical Interfaces in Civil Engineering}, doi = {10.25643/bauhaus-universitaet.163}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1636}, year = {2004}, abstract = {Applications for civil engineering tasks usually contain graphical user interfaces for the engineering processes. Persistent objects of the applications are stored to data bases. The influence of the interaction between a graphical user interface and a data base for the development of an civil engineering application is investigated in this paper. A graphic application for the linear elastic analysis of plane frames, which was previously developed with standard tools of the Java platform, is compared to a redesigned implementation using a generalized data base for persistent objects. The investigation leads to the following results : - A strict distinction between persistent and transient objects influences the class structure of an application, in particular the class structure of a graphical user interface. - The structure of an application depends on the logic for updating of references to persistent and transient graphical objects after an application is read from a file. - The complexity of the reference management can usually be handled better by just in time referencing associated with String - identifiers rather than by automated referencing associated with Name - identifiers.}, subject = {Baubetrieb}, language = {en} } @inproceedings{Zaneldin2004, author = {Zaneldin, Essam}, title = {Investigate the Impact of Different Resource Allocation Strategies on the Design of Building Projects Using Simulation}, doi = {10.25643/bauhaus-universitaet.165}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1658}, year = {2004}, abstract = {The design of building projects involves several types of resources such as architects, structural engineers, mechanical engineers, electrical engineers, and draftsmen, among others. For design firms to stay in business in this very competitive market, they need to manage their resources in a way that improves productivity and cost effectiveness. This task, however, is not simple and requires thorough analysis of process-level operations, resource use, and productivity. Typically, these operational aspects are the responsibility of the design office manager who assigns available resources to the different design projects to save time and lower design expenses. It is noted that limited studies have been carried out in the literature to model overall organizational operations and behavioral aspects, particularly in firms specialized in the design of building projects. In an effort to simplify the modeling process, a simplified modeling and simulation tool is used in this research. A simulation model representing an actual design office was developed assuming that the office performs designs for small, medium, and large size building projects. The developed model was used to simulate several alternatives and examine various resource assignment strategies. The simulation was conducted over ten years and the resulting productivity and income was measured.}, subject = {Baubetrieb}, language = {en} } @inproceedings{Huhnt2004, author = {Huhnt, Wolfgang}, title = {Progress Measurement in Planning Processes on the Base of Process Models}, doi = {10.25643/bauhaus-universitaet.166}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1664}, year = {2004}, abstract = {This paper presents a specific modeling technique that is focused on preparing planning processes in civil engineering. Planning processes in civil engineering are characterized by some peculiarities so that the sequence of planning tasks needs to be determined for each planning project. Neither the use of optimized partial processes nor the use of lower detailed and optimized processes guarantee an optimal overall planning process. The modeling technique considers these peculiarities. In a first step, it is focused on the logic of the planning process. Algorithms based on the graph theory determine that logic. This approach ensures consistency and logical correctness of the description of a planning process at the early beginning in its preparation phase. Sets of data - the products of engineers like technical drawings, technical models, reports, or specifications - form the core of the presented modeling technique. The production of these sets of data requires time and money. This is expressed by a specific weighting of each set of data in the presented modeling technique. The introduction of these weights allows an efficient progress measurement and controlling of a planning project. For this purpose, a link between the modeling technique used in the preparation phase and the execution phase is necessary so that target and actual values are available for controlling purposes. The present paper covers the description of this link. An example is given to illustrate the use of the modeling technique for planning processes in civil engineering projects.}, subject = {Baubetrieb}, language = {en} } @inproceedings{ElRayesKandil2004, author = {El-Rayes, Khaled and Kandil, Amr}, title = {Distributed Computing for the Optimization of Large-Scale Construction Projects}, doi = {10.25643/bauhaus-universitaet.160}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1601}, year = {2004}, abstract = {Available construction time-cost trade-off analysis models can be used to generate trade-offs between these two important objectives, however, their application is limited in large-scale construction projects due to their impractical computational requirements. This paper presents the development of a scalable and multi-objective genetic algorithm that provides the capability of simultaneously optimizing construction time and cost large-scale construction projects. The genetic algorithm was implemented in a distributed computing environment that utilizes a recent standard for parallel and distributed programming called the message passing interface (MPI). The performance of the model is evaluated using a set of measures of performance and the results demonstrate the capability of the present model in significantly reducing the computational time required to optimize large-scale construction projects.}, subject = {Baubetrieb}, language = {en} } @inproceedings{RueppelKlauer2004, author = {Rueppel, Uwe and Klauer, Thomas}, title = {Internet-based Workflow-Management for Civil Engineering Projects}, doi = {10.25643/bauhaus-universitaet.164}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1647}, year = {2004}, abstract = {The growing competition pressure in the building industry increases the demands on the design and construction processes in respect to economical, technical and time aspects. These demands require efficient improvements of the value-added chain, which can be realized mainly with the usage of innovative information- and communication-technologies. To support the collaboration of all participants involved in a certain building project the Workflow-Management-System "BauKom-Online" has been developed. In the focus of the system is to support the coordination of the participants and their information exchange. Such a software-method is well suited to ensure a high quality planning process. The modelling of business-processes enables a better self-comprehension of the participants work and helps to enhance the project performance. The system architecture of BauKom-Online contains two basic components: the processmodelling tool and the workflow-engine. The process-model contains of activities and states of the planning and construction processes and their relations. These connected processes compose the workflow. Such a process-model for engineering purposes has to satisfy several needs, e.g., the consideration of planning and building alternatives, dynamic changes of the model during execution of the project and the linkage to further technical objects like costs, building structure, specifications and documentmanagement. Furthermore, the scheduling of the project can be done within the process-model and can be visualized as a Gantt-diagram. ...}, subject = {Baubetrieb}, language = {en} } @inproceedings{RueppelGutzke2004, author = {Rueppel, Uwe and Gutzke, Thomas}, title = {Groundwater-Monitoring based on dynamic co-operative eGovernment-Processes}, doi = {10.25643/bauhaus-universitaet.161}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1611}, year = {2004}, abstract = {As a result of the pilot-project "Grundwasser-Online" the supervision and the active controlling of large monitoring- and catchment-areas are realised by a co-operative integration of all related institutions, a synchronisation-process to combine all distributed data into one central server database, and a high-level eGovernment-Service to provide evaluated information over the internet. Based on this software system the local authorities are able to supervise the groundwater-levels and to find adequate decisions, which finally result in official permissions for the usage of groundwater-reservoirs by the water supply companies.}, subject = {Baubetrieb}, language = {en} } @inproceedings{FreundtBeucke2004, author = {Freundt, Martin and Beucke, Karl}, title = {A flexible model for scheduling building processes based on graph theory and fuzzy numbers}, doi = {10.25643/bauhaus-universitaet.158}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20111215-1587}, year = {2004}, abstract = {The methods currently used for scheduling building processes have some major advantages as well as disadvantages. The main advantages are the arrangement of the tasks of a project in a clear, easily readable form and the calculation of valuable information like critical paths. The main disadvantage on the other hand is the inflexibility of the model caused by the modeling paradigms. Small changes of the modeled information strongly influence the whole model and lead to the need to change many more details in the plan. In this article an approach is introduced allowing the creation of more flexible schedules. It aims towards a more robust model that lowers the need to change more than a few information while being able to calculate the important propositions of the known models and leading to further valuable conclusions.}, subject = {Baubetrieb}, language = {en} }