Browsing by Author "Akcay, Emre Caner"

Now showing 1 - 9 of 9

Citation - Scopus: 1
An Activity-Based Lessons Learned Model To Support Scheduling Decisions in Construction
(Emerald Group Publishing Ltd, 2025) Yilmaz, Anil; Akcay, Emre Caner; Dikmen, Irem; Birgonul, M. Talat; Civil Engineering; 06. School Of Engineering; 01. Atılım University
PurposeThe aim of this study is to develop an activity-based lessons-learned model that allows construction companies to capture, store, classify and reuse activity-related lessons learned (LL) from previous projects, thereby increasing the reliability of time estimates in scheduling.Design/methodology/approachScheduling is a knowledge-intensive process that requires the utilization of data and expert opinion elicitation from various levels of an organization in construction projects. This research consists of five successive steps: performing a needs analysis, proposing an activity-based lessons-learned process model, validating the proposed process model, developing a tool to apply the proposed model in a computer environment and testing the applicability of the tool. To implement the proposed model in practice, a web-based tool, namely the Construction Industry Scheduling with Activity-Based Lessons Learned Tool (ConSALL Tool), was developed. Its functionality was evaluated using black-box testing. The tool was then applied in a real construction project.FindingsResults show that ConSALL has the potential to improve scheduling decisions in construction projects by incorporating data and experience from previous projects. Findings from this research can be used to develop similar models and AI tools to foster activity-based learning in other project-based industries as well as the construction industry.Originality/valueThis paper presents an innovative approach to enhancing construction project scheduling by leveraging LL from past projects. The development and application of the ConSALL Tool demonstrate a practical implementation of the proposed model, providing a framework that can be adapted to other industries to improve project planning and execution.
Citation - WoS: 13
Citation - Scopus: 15
An Analytic Network Process Based Risk Assessment Model for Ppp Hydropower Investments
(Vilnius Gediminas Tech Univ, 2021) Akcay, Emre Caner; Civil Engineering; 06. School Of Engineering; 01. Atılım University
The number of public-private partnership (PPP) projects has gone up especially in developing countries. The risk assessment of PPP projects is essential in ensuring project success. The objective of this study is to develop an Analytic Network Process (ANP) based risk assessment model for hydropower investments, and a tool to facilitate quantification of risk ratings based on this model. The results show that the three most important risk factors that affect the overall risk rating of a PPP hydropower investment are legal risks, contractor/subcontractor risks, and operator risks. In addition, the three most important risk clusters were identified as stakeholders, government requirements, and resources, whereas market was the least important cluster. The tool that measures the risk rating of a PPP of hydropower project was tested on ten real cases, and satisfactory results were obtained in terms of its predictive capability. The contributions of this research include (1) identification of the risk factors and clusters of factors associated with PPP hydropower investments; (2) determination of the priority of each risk factor and cluster; (3) development a tool that guides the investors through the risk assessment of PPP hydropower investments.
Citation - WoS: 12
Citation - Scopus: 21
Barriers To Undertaking Green Building Projects in Developing Countries: a Turkish Perspective
(Mdpi, 2023) Akcay, Emre Caner; Civil Engineering; 06. School Of Engineering; 01. Atılım University
Green buildings (GBs) play an important role in achieving sustainable development goals. However, the implementation of green technologies in building projects has not reached the desired level in developing countries such as Turkey because of barriers stemming from country-related factors as well as factors related to design and construction. The objective of this study was to explore the barriers to undertaking GB projects in Turkey. A questionnaire survey was administered to 116 construction practitioners to analyze the criticality of barriers to GB design and construction in the Turkish construction industry. Both descriptive and inferential statistics were adopted to evaluate the data obtained from the questionnaire survey. The findings suggest that the major barriers that hinder the adoption of GBs in Turkey are higher construction cost, lack of knowledge about GBs, lack of an authorized GB rating system, unavailability of GB materials, and inadequate market demand, whereas longer design time is the least critical barrier. The results of factor analysis indicate that the barriers to undertaking GB projects can be grouped under five "factors", i.e., cost- and demand-related barriers, market-related barriers, people-related barriers, government-related barriers, and time-related barriers. In light of the results, policy makers and construction practitioners can devise strategies to promote GBs in Turkey, which can also be valid in other developing countries with similar socio-economic conditions.
Citation - WoS: 2
Citation - Scopus: 2
A Comparative Analysis of the Criteria for Choosing Sustainable Materials for Façades in Turkey and the European Union
(Mdpi, 2024) Daskin, Haney Basak; Barbulescu, Alina; Muntean, Radu; Akcay, Emre Caner; Civil Engineering; 06. School Of Engineering; 01. Atılım University
One of the primary contributors to energy consumption is the construction industry. To address the urgent demand for eco-friendly approaches in this field, this study conducted an investigation on Scopus and Web of Science databases to identify the criteria for selecting sustainable materials for facades. Three groups of criteria were derived after a systematic review: Environmental, Social/economic and Technical. The main goal of the research was to answer the question of whether there are differences in these materials' selection between Turkey and European Union countries. After applying statistical tests, it was found that there are significant differences in selecting eco-friendly material only from the social/economic perspective. The most important sub-criterion is the economic cost. Comparisons with results from China and US confirm this finding.
Design Team Effectiveness and Architects' Personality Types
(Emerald Group Publishing Ltd, 2025) Alan, Ece; Arditi, David; Gunaydin, Husnu Murat; Akcay, Emre Caner; Civil Engineering; 06. School Of Engineering; 01. Atılım University
PurposeThe personalities of the design team members constitute one of the factors that influence team effectiveness. In this study, 223 members of the "American Institute of Architects" who are employed by the largest architectural design firms in the United States of America were categorized according to their personality types by using "The Enneagram Personality Type Model." Also, the respondents' opinions about eight team effectiveness outcomes were recorded in order to explore the relationship between team members' personality types and team effectiveness outcomes.Design/methodology/approachThe information was collected by a questionnaire where the first part included 144 pairs of statements that were used to identify respondents' personality types. The second part sought designers' opinions about the importance of eight team effectiveness outcomes rated on a Likert scale ranging from 1 to 5. The results were assessed by performing the Kruskal-Wallis test first and Dunn's post-hoc test with Bonferroni adjustment subsequently.FindingsThe findings highlight the significance of personality types in effective design teams. While Type 6 (loyalist and skeptic) and Type 3 (achiever and performer) architects prioritize team effectiveness the most, Type 7 architects (enthusiasts and epicureans) assign the lowest importance. However, the presence of Type 1 (reformist and perfectionist) and Type 8 (challenger and protector) architects within the same design team may involve challenges or conflicts.Originality/valueThe primary contribution of this study is that it is the first study in the construction management literature that utilizes The Enneagram of Personality Test to understand the relationship between team members' personality types and team effectiveness outcomes. This study is of direct relevance to practitioners and could be utilized in design team-building activities.
Citation - WoS: 4
Citation - Scopus: 4
Exploring the Critical Risk Factors of Public-Private Partnership City Hospital Projects in Turkey
(Mdpi, 2024) Dogan Erdem, Tugba; Birgonul, Zeynep; Bilgin, Gozde; Akcay, Emre Caner; Civil Engineering; 06. School Of Engineering; 01. Atılım University
Governments face challenges in delivering essential public services due to their limited funds. This has led to an increasing reliance on the Public-Private Partnership (PPP) model, an alternative financing model involving a long-term collaboration between the private and public sectors to provide public services. Turkey, as a developing country facing financial limitations, has embraced the PPP model to address urgent public needs. Over the past decade, the Turkish Government has extensively utilized the PPP model, particularly in executing city hospital projects. However, investors have faced challenges in project execution due to various risk factors. Therefore, the main objective of this study is to explore the critical risk factors associated with PPP city hospital projects in Turkey. In this context, a comprehensive literature review was conducted to identify potential risks related to PPP city hospital projects. A questionnaire survey was implemented to assess the probability of occurrence and the severity of the impact of these risk factors. The collected data underwent analysis to determine the priority of these risk factors. The findings revealed that the top five most critical risk factors in PPP city hospital projects in Turkey are "foreign exchange rate fluctuations", "inflation rate volatility", "high finance costs", "fiscal issues", and "economic crises". Conversely, "unavailability of equipment" was identified as the least significant risk factor. The insights gained from this research can offer valuable guidance for prospective investors interested in participating in PPP city hospital projects in Turkey and other developing countries with similar conditions.
Investigating the Barriers To the Adoption of 3d Printing Technology in the Turkish Construction Industry
(Springer International Publishing Ag, 2025) Latifiilkhechi, Leva; Aminbakhsh, Saman; Akcay, Emre Caner; Civil Engineering; 06. School Of Engineering; 01. Atılım University; Department of Civil Engineering; 15. Graduate School of Natural and Applied Sciences
In recent years, 3D printing has emerged as a transformative force in construction technology. This innovative technology has found applications in many construction and bridge-building projects, starting a new era of automation and efficiency. Notably, the impact of 3D printing on the construction industry has been profound, yielding benefits such as reduced labor requirements, minimized material waste, accelerated project timelines, and a significant reduction in hazardous tasks for human workers. In contrast to conventional construction approaches, 3D printing stands out for its environmentally friendly characteristics, challenging traditional notions of geometric complexities and constraints in construction processes. While 3D printing technology undeniably offers a multitude of advantages over traditional methodologies, it is crucial to acknowledge that it also introduces its own set of unique challenges and risks. The main aim of this study is to investigate the barriers that hinder the adoption of 3D printing technology in the Turkish construction industry. Towards this, first, the list of potential barriers was extracted from multiple reputable sources, including Scopus, ScienceDirect and Web of Science databases. Based on this list, an online questionnaire was prepared to assess the impact of 19 potential barriers on the implementation of 3D printing technology in the Turkish construction industry. The findings and research directions articulated in this study create fresh pathways for further inquiry and substantial contributions to the evolving field of 3D printing in the construction industry.
Citation - WoS: 4
Citation - Scopus: 5
Predicting Employer and Worker Responsibilities in Accidents That Involve Falls in Building Construction Sites
(Mdpi, 2022) Akcay, Emre Caner; Arditi, David; Civil Engineering; 06. School Of Engineering; 01. Atılım University
Fall-related accidents have received more attention in building construction than in civil construction as fall-from-heights is more common in building construction. In addition to social costs, construction companies face a significant financial burden when fall-related accidents occur. The major portion of the direct cost of accidents that involve falls includes the compensation paid by the employer to the worker. The employer and the worker try to reach an agreement on the size of the compensation, however, most of the time the process is contentious. The objective of this study is to predict the parties' responsibilities for a fall-related accident by modeling the relationship between the employer and the worker using a multi-agent system. The research pursued a three-step method, including collection of data, development of a multi-agent model, and testing of the model. The model provides satisfactory results and can be used to quantify the employer's and the worker's responsibilities in construction fall accidents, hence avoiding any escalation to pursue arbitration or litigation.
Citation - WoS: 8
Citation - Scopus: 8
Real Options Valuation of Photovoltaic Investments: a Case From Turkey
(Pergamon-elsevier Science Ltd, 2024) Or, Bartu; Bilgin, Gozde; Akcay, Emre Caner; Dikmen, Irem; Birgonul, M. Talat; Civil Engineering; 06. School Of Engineering; 01. Atılım University
Investments in renewable energy resources have become inevitable due to increasing energy demand and energy prices, diminishing non-renewable energy resources, and the outgrowth of carbon footprints. Photovoltaic (PV) systems offer high solar energy potential in sustainable energy production whereas their high initial costs necessitate critical strategic valuation of investments. Valuation with conventional methods has been challenging due to existence of uncertainties such as fluctuating PV panel prices, changing meteorological conditions with certain effects on power generation, and governmental policies on energy market regulations. This study aims to propose a real options approach to valuation of residential rooftop PV system investments considering these uncertainties and demonstrate benefits of this approach with an application on the residential PV investment decisions in Turkey. The proposed method, Real Options Valuation (ROV) with Least-Squares Monte Carlo Simulation (LSMC) considers the deferral option of the investor by utilizing stochastic simulations, the discounted cash flow method, linear regression, and backward dynamic programming and thus evaluates the effects of uncertainties on financial attractiveness of residential PV investments. The case study findings proved that ROV with LSMC having a 7-years deferral option supported the investment decision with realizable cost-effective options while "NPV method" resulted in an infeasible investment. Scenario analysis was also conducted to explore policy options that can be used to promote solar energy investments in Turkey. This study has a potential to have practical contributions for investors as well as implications for policy-makers.