Journal of engineering and construction management

Abstract In this study, contractor’s claim and its management in in turnkey contracts according to FIDIC has been discussed through library studies and surveys among experienced specialists in international civil projects and then this discussion has been developed with benefit of modeling the claim using system dynamics and its evaluattion on a case study as well as relying on opinions of experts.As a result of modeling the claims of contractors in in turnkey contracts according to FIDIC, the most important variables and parameters affecting or affected the claims, their intensity and type of relationship with each other was determined in this contracts.The results show that modeling by system dynamics method is very useful for qualitative and quantitative analysis of the contractor’s claims.can be admitted the most important factors affect the claims of contractors in turnkey contracts according to FIDIC that 75% of them are financial claims are the delays of employer payments with a share of about 60% , project changes with a share of nearly 20% and both are under the influence of strategies and management procedures, Also their intensity will be increased in force majeure situations and unexpected events, Moreover, The lack of project management system and risk allocation and not having got of ownershipflotationon the project scheduledisturbance in process of managing the claims of contractors in Turnkey contracts according to FIDIC.

Abstract Value engineering is an organized effort to analyze the performance of systems, equipment, services, and institutions in order to achieve real performance with the lowest cost of project lifetime, which is consistent with the quality and safety of the project. Value engineering is one of the improvement and problem-solving techniques that has been proven to be effective over more than half a century in various industrial, service, construction, and manufacturing sectors. Expansion of the application of value engineering in the design and implementation of construction projects indicates the ability of this approach to reduce the cost of increasing and improving the quality of the project and creating added value that can play a significant role in the successful implementation of development projects that the budget and cost section plays And leads to an effective upgrade of quality and lower costs. In this paper, we have investigated the value engineering approach in designing and implementing construction projects. The results obtained from the assumptions of the research indicate that 5 assumptions have been confirmed. Also, the reliability of statistical tests was determined by designing the neural network

Abstract Generally, increasing complexity of the structural stages of the contracts and contracting conditions as well as inconvenient conditions of projects including Meteorological, political, and leads to intensification of disputes, claims and litigation between the parties to the contract and the resulting effects of them in terms of time and money in the project. And this issue which is exacerbated by international agreements may lead to the termination of the contract. On the other hand, the termination of the contract will increase the incentive for contractors to deal with existing claims. In such a situation, it is obvious that the existence of a management system in accordance with international standards has a significant role in identifying the existing claims, which will result in avoiding claims and facilitating the handling of claims and disputes between the two sides. Therefore, Management of contractor's claim in EPC/Turnkey projects according to FIDIC under termination and dissolution of contract has been studied in this study. For this purpose, with its reliance on PMBOK, it has been tried to collect interviews and questionnaires among experts in civil engineering projects and rely on experts' opinion, as well as using system dynamics modeling, the claims to be more accurately and practically analyzed in these conditions so that the contractor can keep his rights in terms of termination and suspension, and is more prepared to receive his lost salary.

Abstract The current research aims to identify and rank the risks involved in the construction projects of high-rise buildings of Mashhad using Analytic Hierarchy Process (AHP) model. To achieve the research objective, through reviewing the literature, the different criteria and dimensions of the risks involved in construction industry and high-rise building projects were identified and on the basis of those criteria and dimensions, the research questionnaire was prepared and its reliability and validity were verified. The statistical population consisted of the entire managers of the construction companies of high-rise building of Mashhad, which 45 individuals of them were identified and based on whole-counting sampling method, all of them were selected as the research statistical sample. After data collection, to answer the research questions, various analytical methods including Confirmatory Factor Analysis (CFA) and Analytic Hierarchy Process (AHP) were utilized. The generated results of CFA revealed that the existing risks in the construction projects of high-rise buildings can be categorized into two taxonomies of internal and external risks. The generated results of AHP indicated that the internal risks are more important than the external risks of the construction projects of high-rise buildings of Mashhad.

Abstract I
Implementation of construction projects will result in social welfare and economic growth in any country. Considering the massive amount of activities, the collection, sorting and distribution of similar solutions used by organizations will make significant contributions to this industry. Todays, duration of projects execution, scheduling is significant, particularly in economic justification of the project. All managers tend to accelerate or reduce the diversion of projects, but despite the detailed planning at the beginning of the projects, the average time and cost deviation in the development projects are usually much higher than predictions. Thus, knowing the factors affecting the delay in project time and providing solutions for accelerating projects is significant.
While knowledge management is one of the most powerful tools in management science, it will be very useful in identifying empirical solutions in this regard. In this paper, using library and field studies, first, the obstacles and problems of timely implementation of the projects are categorized and then the identified solutions are presented using the experiences of various construction companies.
Keywords: Construction Project; Scheduling; Knowledge Management;

Abstract Crawford and Hasters Nehymas are keen on using projects as a way to change organizations. Parker has proposed this as a necessity for organizations that want to use a project-based project as a leverage to ensure the success of their organizational change. Sodernald has shown that the vast increase in workplaces has changed the composition of elements. It has been said that organizational change involves more than one technical process. Organizational management and management over time have shown that effective management change and Leadership has a significant impact on the success rates of organizational projects. With regard to the results of the academic and non-academic analysis of the project, it seems that the focus has been on a few things, such as the process steps of the project on the need for technical integration and the physical and social issues that were not exceptions. The present paper examines the need for the impact of ongoing projects on organizational transformation projects and the willingness of project managers to use the trained and competent organization and psychosocial perspective in executing project implementation processes at this time. Field shows.