1,721,025 research outputs found
How the Residents are Affected from Construction Operations Conducted in Residential Areas
No full textAbstractThe construction projects have adverse impacts on the residents who live at a neighborhood of a construction project. In the literature, these adverse impacts are identified and the social cost of these adverse impacts are formalized. However, in all these studies, all adverse impacts are assumed to create nuisance at the same level, whereas the residents are more sensitive to some of these nuisances, on the other hand some of the nuisances which are considered in the social cost studies can be overlooked by the residents, and therefore this can cause misleading calculations of social cost. In order to overcome shortcoming of social cost studies, a study, which aims to identify the level of effects of each nuisance on the residents, is conducted by performing a questionnaire survey. 266 respondents are obtained at the end of the study, and the data obtained by questionnaire survey is analyzed by using descriptive analysis. According to this analysis, loss of peace and quietude of the neighborhood, cleanliness of the house, and degradation of ambient conditions are identified as the most disturbing nuisances. In addition, the country conditions and culture of the region is considered as important factors that play an important role in the intensity of adverse impacts
An exploratory study on utilization of BIM for risk management
No full textIt is a well-known fact that BIM application in construction projects enables several advantages such as better collaboration and communication, effective project visualization before construction, more efficient cost estimation and scheduling, and an increase in productivity. Although many of these advantages that BIM contributes to construction projects may result in opportunities for better risk management, there are limited studies in the construction management literature that investigate this subject. For this purpose, a study was conducted to explore the utilization of BIM for risk management and its impact on the level of risks in construction projects. Consequently, a survey was prepared and administered to experts knowledgeable in the construction project management area and BIM. The survey was responded by 65 experts. The results show that BIM's integration in the risk management process is considered as beneficial for many reasons. BIM is found to be an application/tool that may primarily lead to the reduction of risks at the design and construction phases of projects. Moreover, survey findings indicate that BIM is interpreted as not only beneficial to reduce risks during design and construction phases, but also can effectively be used to store risk-related information and share experience between the parties of a project. The findings of this research can be used by practitioners to integrate BIM with their risk management practices and also by researchers that aim to develop tools/methods to enhance risk management, particularly by BIM
A Case Study of Using Innovation Catcher as an Innovation Performance Assessment Framework for Housing Projects
No full textThe crucial role of innovation in improving or even maintaining the strategic position and competitive advantage of construction companies in a highly competitive industry is widely acknowledged. In this sense, construction companies are spending a substantial amount of money and time on innovation activities. However, an in-depth literature review showed that available innovation assessment frameworks are not capable of revealing the outputs of these investments and capturing the actual innovation performance of the companies. In this research, we developed the Innovation Catcher (IC) as an innovation performance assessment (IPA) framework for project-level IPA of the housing projects. Based on the findings from the literature, the dimensions of Innovation Radar that is a previously available model in the literature were modified for housing projects. An application of the IC has been demonstrated by a case study carried out in collaboration with a Turkish contractor. Seven semi-structured interviews were carried out with an expert to collect data. Based on the IC application, it was concluded that IC is capable of reflecting the actual innovation performance of the housing projects and can be used as supportive material in the documentation, and short-term and long-term decision-making processes
A Categorization of BIM-Related Legal Issues
No full textAs Building Information Modeling (BIM) brings effectiveness and better quality into the sector, it has broadened its usage worldwide throughout recent years. This expansion also motivates researchers to investigate potential problems that may occur while adapting and using BIM. Since it has modified the nature of the relationships between the parties differently than the traditional project delivery, legal issues such as Model Ownership and Intellectual Property, Contractual Relationship of Parties, Design Liability may become more critical. Hence, institutions and authorities have published protocols and standard forms of contracts to overcome such issues. However, lately, in the courts of the leading countries in BIM, like the UK and the USA, there are several BIM-related case law that are recording the encountered issues due to some perceived legal problems mentioned above. Therefore, in this paper, a categorization of potential legal issues is developed by investigating related publications. By categorizing potential BIM-related issues, this paper not only eases the way for examining related claims but also suggests conducting a case law examination with these categories to see how much of the legal issues mentioned in the literature are causing problems
Literature review on BIM-based building energy performance optimization
No full textBuildings comprise a large part of global energy consumption and make a significant contribution to overall CO2 emissions in the world. Therefore, increasing the energy efficiency of buildings becomes a priority to reduce these undesirable effects. Building energy performance assessments are complex multi-criteria problems as the energy performance is affected by many factors such as building orientation, envelope design, climate conditions, daylighting levels, and HVAC system usage schedules. This complicated situation makes it difficult to accurately predict building energy consumption. BIM (Building Information Modeling) has started to be used to calculate the energy consumption of buildings, as its use is increasing in many areas of the construction industry. BIM not only aids in estimating the energy performance but also has the capacity to provide the necessary data for optimizing the energy use of a building by changing parameters that affect the energy usage. This study aims to do a literature review on BIM-based building energy performance optimization. As a result, it will provide a review of the methods that can be leveraged in building energy optimization, which can help designers more easily assess energy efficiency when making design decisions
Evaluation of Delay Causes for BOT Projects Based on Perceptions of Different Stakeholders in Turkey
No full textBecause delays are common in construction projects, causes of delays are widely investigated in the construction-management literature. However, there is no consensus on the relative severity of various causes of delay because severity may change with respect to project characteristics, such as the type of project and/or procurement type. Public-private partnership (PPP) has been utilized extensively in recent years, and the number of public construction works worldwide that adopted the PPP has increased gradually. However, the delay causes specific to PPPs have not been investigated deeply. Moreover, the perceptions of different stakeholders on causes of delay in PPP projects have never been investigated, although the perception difference between stakeholders is considered an important issue in delay management. In this study, the perceptions of three key stakeholdersnamely, consultants, the private sector, and the public sectoron delay causes in build-operate-transfer (BOT) projects performed in Turkey, which is one of the leading countries in terms of number of PPP projects and the total value of PPP projects, were investigated. The delay causes specific to BOT projects were evaluated by conducting a workshop to determine the causes of delay in the Turkish market. The identified delay causes were evaluated using the analytical hierarchical process (AHP) by 11 participants who represent consultants, the private sector, and the public sector. The correlations between the respondents were evaluated using Pearson's correlation coefficient and Spearman's rank correlation coefficient. This study showed that the most important delay causes are related to the uncertainties and changes. In particular, private sector participants emphasized the importance of certainty on political and governmental issues and minimization of changes in design to avoid delays in BOT projects. In contrast, the respondents from the public sector proposed that a detailed feasibility study and preliminary plan should be prepared and the transfer stage should be planned carefully. Finally, different perceptions were observed among the stakeholders at the stages where the collaboration of the stakeholders is limited
Stratejik grup analizi: inşaat sektöründe stratejik perspektif, farklılaşma ve performans
No full textThe aim of strategic group analysis is to find out if clusters of firms that have a similar strategic position exist within an industry or not. In this thesis, by using a conceptual framework that reflects the strategic context, contents and process of construction companies and utilising alternative clustering methods such as traditional cluster analysis, self-organizing maps, and fuzzy C-means technique, a strategic group analysis was conducted for the Turkish construction industry. Results demonstrate that there are three strategic groups among which significant performance differences exist. Self-organising maps provide a visual representation of group composition and help identification of hybrid structures. Fuzzy C-means technique reveals the membership degrees of a firm to each strategic group. It is recommended that real strategic group structure can only be identified by using alternative cluster analysis methods. The positive effect of differentiation strategy on achieving competitive advantage is widely acknowledged in the literature and proved to be valid for the Turkish construction industry as a result of strategic group analysis. In this study, a framework is proposed to model the differentiation process in construction. The relationships between the modes and drivers of differentiation are analyzed by structural equation modeling. The results demonstrate that construction companies can either differentiate on quality or productivity. Project management related factors extensively influence productivity differentiation whereas they influence quality differentiation indirectly. Corporate management related factors only affect quality differentiation. Moreover, resources influence productivity differentiation directly whereas they have an indirect effect on quality differentiation.Ph.D. - Doctoral Progra
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