TY - JOUR AU - Selcuk, Onur AU - Turkoglu, Harun AU - Polat, Gul AU - Hajdu, Miklós TI - An integrative literature review on the causes of delays in construction projects: evidence from developing countries JF - INTERNATIONAL JOURNAL OF CONSTRUCTION MANAGEMENT J2 - INT J CONSTR MANAG VL - 24 PY - 2024 IS - 6 SP - 610 EP - 622 PG - 13 SN - 1562-3599 DO - 10.1080/15623599.2022.2135939 UR - https://m2.mtmt.hu/api/publication/33265210 ID - 33265210 N1 - Department of Civil Engineering, Istanbul Technical University, Istanbul, Turkey Department of Construction Technology and Management, Budapest University of Technology and Economics, Budapest, Hungary Export Date: 24 November 2022 Correspondence Address: Hajdu, M.; Department of Construction Technology and Management, Hungary; email: miklos.hajdu63@gmail.com AB - Delays have commonly been a serious problem. This study aims to evaluate, criticize, and synthesize the literature on the causes of delays in construction. A total of 70 journal articles from 33 countries focussing on identifying the causes of delays were critically analysed. The main findings of this study are that the questionnaire survey is the most commonly used data collection method, the project phases at which the causes of delays are identified is not clearly stated in the majority of the reviewed articles, there is no agreement on the classification of causes of delays, the number of causes of delays studied by researchers greatly varies, the term 'delay' is not clearly defined in the majority of the articles, there is no standardized terminology for the causes of delays, key variables such as type of project, project delivery system and contract type are mostly ignored, and the location of the project is an important variable to consider when identifying the causes of delays. The findings of this study provide researchers, practitioners, and construction professionals with a detailed reference, which can assist them in better understanding the causes of delays, taking the necessary proactive actions, and improving the overall project performance. LA - English DB - MTMT ER - TY - BOOK ED - Hajdu, Miklós ED - Skibniewski, Jan Mirosław TI - Proceedings of the Creative Construction e-Conference (2022) PB - Diamond Congress Kft. CY - Budapest PY - 2023 SN - 9786155270758 UR - https://m2.mtmt.hu/api/publication/33601653 ID - 33601653 LA - English DB - MTMT ER - TY - BOOK ED - Mirosław, Jan Skibniewski ED - Hajdu, Miklós TI - Proceedings of the Creative Construction Conference 2023 PB - Diamond Congress Kft. CY - Budapest PY - 2023 SN - 9786155270796 UR - https://m2.mtmt.hu/api/publication/34080788 ID - 34080788 LA - English DB - MTMT ER - TY - CHAP AU - Sebestyén, Zoltán AU - Erdei, János AU - Hajdu, Miklós ED - Mirosław, Jan Skibniewski ED - Hajdu, Miklós TI - A FUNDAMENTAL OVERVIEW OF THE CONCEPT OF QUALITY IN PROJECT MANAGEMENT T2 - Proceedings of the Creative Construction Conference 2023 PB - Diamond Congress Kft. CY - Budapest SN - 9786155270796 PY - 2023 SP - 720 EP - 724 PG - 5 UR - https://m2.mtmt.hu/api/publication/34080793 ID - 34080793 AB - The importance of quality is now recognized in every expertise. Quality management has significantly evolved over more than the last half-century, and the methods and techniques involved have been developed, their levels described in detail. During this evolutionary process, quality has been defined in several quality management sources, and its interpretation has changed and been positioned at high levels. Although the role of quality in projects is critical, it has not been defined as well in general. Quality in projects has been addressed in numerous textbooks, international methodologies, and articles, yet it has not been harmonized. This conference paper covers the first part of a research project with the ultimate goal of a proper definition of quality in project management, which will allow us to measure and predict quality during project execution. For this purpose, we review the definitions of quality and the significant milestones in general and project management. So, deriving from the research project, the goal of this paper is to overview quality in project management by comparing it with the scientific position in quality management. This research provides all the necessary bases to serve the objectives mentioned above. Through the final research findings, we could suggest future research that will bring project management up to date not only in the quality definition but also in the practice of quality management. LA - English DB - MTMT ER - TY - JOUR AU - Lepel, Adrienn AU - Hajdu, Miklós TI - Influence lines for schedule networks JF - IOP CONFERENCE SERIES: MATERIALS SCIENCE AND ENGINEERING J2 - IOP CONF SER MATER SCI ENG VL - 1218 PY - 2022 PG - 9 SN - 1757-8981 DO - 10.1088/1757-899X/1218/1/012058 UR - https://m2.mtmt.hu/api/publication/32676579 ID - 32676579 LA - English DB - MTMT ER - TY - GEN AU - Bilal, Ktaish AU - Hajdu, Miklós TI - Perception of project success PY - 2021 UR - https://m2.mtmt.hu/api/publication/32623335 ID - 32623335 N1 - Conference presentation LA - English DB - MTMT ER - TY - JOUR AU - Mályusz, Levente AU - Hajdu, Miklós AU - Vattai, Zoltán András TI - Comparison of different algorithms for time analysis for CPM schedule networks JF - AUTOMATION IN CONSTRUCTION J2 - AUTOM CONSTR VL - 127 PY - 2021 PG - 13 SN - 0926-5805 DO - 10.1016/j.autcon.2021.103697 UR - https://m2.mtmt.hu/api/publication/32352144 ID - 32352144 N1 - Budapest University of Technology and Economics, Budapest, Hungary Chaoyang University of Technology, Taiwan Export Date: 26 January 2022 CODEN: AUCOE Correspondence Address: Hajdu, M.; Budapest University of Technology and EconomicsHungary; email: miklos.hajdu63@gmail.com AB - Traditional Critical Path Method (CPM) and its different generalizations have become the prevailing technique in managing complex projects over recent decades. Among them, Precedence Diagramming Method (PDM), with its four precedence relationships, has become the most popular due to its increased flexibility in modeling complex project logic. Despite the four well-known precedence relationships, CPM/PDM still suffers from modeling shortcomings. Developments such as conditional logic, maximal relationships, point-to-point relationships, continuous relationships, and non-linear activities attempt to remedy these problems. However, these improvements require more complex and sometimes iterative time analysis. Monte Carlo (MC) simulation, which calculates the effects of risks on the project duration, also requires numerous repetitions of the deterministic time analysis. It is especially true if the network contains the developments mentioned above. In these cases, the time analysis speed is of great importance. The goal of this study is a) to implement different algorithms for time analysis that perform better than the traditional time analysis, b) to compare their speed on large-scale artificially created projects, c) to make suggestions regarding which algorithms are suitable in different cases d) to develop a database containing artificially created networks to serve as a basis for benchmarking for researchers and developers working in the field of project planning. Comparisons were based on networks with at least 1000 activities. Results show that, depending on the sample network's structure, different algorithms perform well. Therefore, different time analysis algorithms are necessary to implement into the scheduling tools, and they can decide which algorithms perform better. LA - English DB - MTMT ER - TY - GEN AU - Hajdu, Miklós TI - Teaching Project Planning: How to convince students on the importance of project planning? PY - 2021 UR - https://m2.mtmt.hu/api/publication/32623091 ID - 32623091 N1 - KEYNOTE presentation LA - English DB - MTMT ER - TY - CHAP AU - Mályusz, Levente AU - Hajdu, Miklós AU - Vattai, Zoltán András ED - Hajdu, Miklós ED - Mirosław, Jan Skibniewski TI - Comparison of Different Algorithms for Time Analysis for PDM Schedule Networks with Stretchable Activities T2 - Creative Construction e-Conference 2020 PB - Diamond Congress Kft. CY - Budapest SN - 9786155270611 PY - 2020 SP - 52 EP - 52 PG - 1 UR - https://m2.mtmt.hu/api/publication/32622529 ID - 32622529 LA - English DB - MTMT ER - TY - CHAP AU - Mályusz, Levente AU - Hajdu, Miklós AU - Vattai, Zoltán András ED - Hajdu, Miklós ED - Mirosław, Jan Skibniewski TI - Comparison of Different Scheduling Algorithms for Real Life Projects T2 - Creative Construction e-Conference 2020 PB - Diamond Congress Kft. CY - Budapest SN - 9786155270611 PY - 2020 SP - 53 EP - 53 PG - 1 UR - https://m2.mtmt.hu/api/publication/32622497 ID - 32622497 LA - English DB - MTMT ER -