Numerous studies have been conducted by researchers on the delay analysis topic, which is one of the primary areas of scientific study due to the effects of delays on time and cost in construction projects. Following fruitful contributions made by the researchers, it is believed to be extremely important to summarize the existing studies in terms of being a road map for future studies and practitioners. In this context, not only does this study aim to detect the most significant authors, sources, organizations and countries contributing to the improvement of delay domain in the construction industry concerning delay analyses worldwide but also to provide the researchers with extensive insights concerning the prominent research themes, trends and gaps in the literature. Hence, 168 documents related to delay analyses from 1982 to 11 February 2021 were detected through the Scopus Database and the Web of Science Database, and scientometric analyses were conducted via VOSviewer software. By evaluating the related research, two main research areas were detected in this field, namely; improving the delay analysis methods and resolving the disputes before they occur. This study is believed to make theoretical and practical contributions in that it examines the delay analysis topic in all aspects such as prominent institutions, countries, authors and sources, synthesizes the data and highlights possible research domains, gaps and trends concerning the delay analysis topic in construction industry.
Projects are laden with variety of uncertainties depending on their respective characteristics. Construction projects also have their own distinctive characteristics, such as technologies applied and numerous uncertainties. Thereby, it is highly probable that disputes could be encountered between concerned parties. While resolving these disputes, unspecialized legal professionals conducting construction related cases would increase the number of unsatisfactory judicial results. In this study, it is aimed to classify the most frequent dispute sources concerning the construction sector and to identify the qualifications and competency levels of concerned judicial actors. Correspondingly, 282 cases between 2007 and 2017 in Turkey are classified regarding relevant contents and analyzed. These cases are extracted from legal websites. While elaborating the cases, content analysis is performed in order to categorize the sources of disputes. Moreover, by inspecting the judgments of Court of Cassation for each case, qualifications and competency levels of judicial actors are questioned. In conclusion, the main dispute sources are classified under 5 headings along with some associated subheadings. Among the subheadings, construction works, construction contracts, debits and credits are detected as the most frequent dispute sources. Secondly, in majority of the cases, reassessment decisions were given by Court of Cassation due to inadequate competency levels of Court of First Instance and expert reports.
Although the rapidly growing construction sector is a sign of emerging economies for the countries, numerous events of disputes which may conclude with litigation might be encountered in projects more often. Additionally, grounded in our previous study regarding the construction cases between 2007 and 2017 in Turkey, it is detected that Court of Cassation rejected the determination of Court of First Instance by 96%. Concerning this, there appears the question if the legal actors playing crucial roles in litigation process are technically qualified to the extent of satisfactory level. This problem necessitates investigating the qualifications and competency levels of judicial actors. Studies conducted concerning this matter are limited. Hence, to detect the qualifications and competency levels of judicial actors, semi-structured interviews with the major actors of the construction related cases such as judges, lawyers and contractors are conducted in this study. The interviews are analysed through content analysis to address the competencies and qualifications of the judicial actors. One of the remarkable findings is that the young judges and the lawyers accepting all kinds of cases instead of specializing on particular subjects tend to make wrong assessments due to insufficient legal and technical knowledge concerning construction. Additionally, summoning a technical person as an expert witness to all kinds of cases related to construction without considering his/her main specialized area such as construction management, geotechnics, hydraulic, structure etc. contribute to wrong assessments of the cases.
Bu çalışmada yüzey kaplama ve tesviye amacı ile kullanılan şap harcı üretiminde genleştirilmiş cam agregası ve genleştirilmiş perlit agregası kullanarak şap harçları üretilmiş ve şap harcı malzemesinin birim hacim ağırlığının azaltılması, ısı ve ses izolasyon performanslarının arttırılması hedeflenmiştir. Bu amaçla inşaat sektöründe yaygın olarak kullanılan 4 tip çimento kullanılarak, genleştirilmiş cam agregası (0.25-0.5 mm) ve genleştirilmiş perlit agregası (0.25-0.5 mm), CEN standart kumu yerine %0, %15 ve %30 oranlarında ikame edilmiştir. Elde edilen ikameli şap numunelerinde yoğunluk, ısı ve ses izolasyon performans özellikleri deneyler ile belirlenmiştir. Bu deneylerde TS EN 13892-1 standardına göre şap harçları üretilmiş ve TS EN 13813 standardına göre çimento esaslı şap harçlarında belirlenmesi zorunlu olan basınç dayanımı, eğilme dayanımı ve aşınma direnci deneyleri yapılmıştır. Çalışmanın sonucunda; 17.60 MPa-58.00 MPa basınç dayanımı aralığında, 4.00 MPa-11.16 MPa eğilme dayanımı aralığında, 9.22 cm 3 /50 cm 2 -17.26 cm 3 /50 cm 2 aşınma direnci aralığında, 1.669 g/cm 3 -2.192 g/cm 3 yoğunluk aralığında, 0.151-0.249 ses yutma katsayısı aralığında ve 0.446 W/mK-0.817 W/mK ısıl iletkenliği aralığında, genleştirilmiş cam agregalı ve genleştirilmiş perlit agregalı şap harçlar elde edilmiş olup şap harçlarının ilgili parametreler ile olan ilişkisi irdelenmiştir.
PurposeThe purpose of this paper is to propose a disruption claim management (DCM) life cycle and a risk management framework to provide comprehensive guidance to construction practitioners for facilitating effective and efficient DCM.Design/methodology/approachDCM life cycle was initially developed through a focus group discussion (FGD) with the participation of the construction practitioners who have diverse experiences about DCM. The life cycle is comprised of 6 phases and also includes proper reactions of the owners and contractors. Then, 42 risk factors that can impact the deliverables of DCM were identified through a literature review and an additional FGD session. This was then followed by a Fuzzy Analytical Hierarchy Process (FAHP) which was performed to evaluate the importance of each risk factor in terms of the factor's impact on the success of DCM. Additionally, consistency analysis was performed to further maximize the reliability of the results.FindingsFindings revealed that a proactive and systematic approach should be adopted and DCM practices should be initiated before any disruption event is triggered. Accordingly, the proposed framework recommends DCM practices to be initiated early in the contract development phase since compensation for the disruption might be recovered only to the extent that the contract permits. The contract-related risks were given top priority by the experts so that the results of the fuzzy AHP analysis also verified the significance of the contract development phase. Besides contract-related risks, risks related to insufficient site observation, ignorance of the project team, cognitive bias and conflict of interest were determined as the most significant DCM risks, needing an urgent and sophisticated risk response plan. Lastly, results suggested that “Site observation and record-keeping” is the most formidable phase since the phase's implementation on a continuous basis could create unforeseen organizational challenges such as mismanagement of project records, especially in the dynamic and turbulent environment of the construction projects.Originality/valueDisruption – which is caused mostly by change – is inevitable in construction projects due to their sophisticated nature. DCM, therefore, becomes crucial to compensate losses of contractors and eliminate or diminish the prolonged dispute resolution process. Existing studies, however, do not provide a comprehensive theoretical basis for the DCM life cycle and DCM life cycle's potential risks so that DCM life cycle's promising benefits can hardly be materialized. Thus, developing a DCM life cycle and associating DCM life cycle with risk management, this study is highly believed to make a promising theoretical contribution to the DCM domain since this is one of the earliest attempts in the literature. Additionally, this research provides construction practitioners with an insight into the effective implementation of DCM practices in construction projects.
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