نشریه مهندسی و مدیریت ساخت
سال پنجم شماره 2 (پیاپی 18، تابستان 1399)

On the one hand, the amount of productivity in construction projects is influenced by different factors with continuous behavior over time, and on the other hand, by the interaction and interaction between the human resources present in the project. In this research a new tool for modeling and predicting productivity in construction projects is presented by integrating the system dynamics simulation method and agent-based modeling method. Using a combination of system dynamics simulation and agent-based modeling enables us to consider a variety of factors affecting productivity simultaneously. In this research, all the effective factors and factors that have continuous behavior over time will be modeled using system dynamics simulation. In the following, factor-based modeling approach is used to consider the effect of the interactions between the manpower present in the project on productivity. Finally, by combining and integrating the two systems of system dynamics simulation and agent-based modeling, a hybrid model for predicting the productivity with all the effective factors is presented.

Currently, many cities in the country are facing a problem called worn-out texture. These textures are the old core of cities and have become worn out and inefficient over time, or formed in modern times without observing the rules and regulations of architecture and urban planning. And so they are now facing a lot of problems and they are spreading to the whole city. It seems that in the worn texture, due to the wide range and intensity of the problems facing these tissues, the most efficient approach that can be used to deal with With the shortcomings and shortcomings, it is possible to achieve the goals of sustainable development in the field of improvement of these tissues. A conceptual model has been proposed to determine potential risks in a qualitative manner in Fakharan neighborhood, located in the east of Kazerun city. The results show that the passage of buildings and the destruction of buildings are in the range of risk severity, respectively. Potential for the study area.

 Seismic upgrading of educational buildings is one of the government's top priorities after the Bam earthquake. This incident drew the attention of the authorities to the fact that the renovation of educational buildings in Iran is a historical necessity If not answered properly, they will be responsible for future generations of the country. This research is done in order to identify the challenges facing the Organization in relation to the implementation of educational buildings and retrofitting offer know-how to fix them. At first, by studying the literature of the subject and researching on the problems of projects and the success factors of organizations in achieving their quality goals, and according to experts, several factors were identified as major challenges in the school renovation organization. Then, the questionnaires were collected and analyzed by the Provincial School Renovation Project. Priority problems were then identified and solutions were considered by experts to address the initial priorities of these challenges.

The present study was an attempt to identify the factors influencing business model using the multi-criteria decision-making approach. Review of the literature on business models shows that competitive models and Porter's value chain play a vital role in business models. In the present study, the experts of Mohandesi Sazan construction and sale Company investigate the critical foundations of business model, the importance of Porter's value chain and different elements of competition in order to evaluate and prioritize Porter's competitive models and value chain. The instruments used in this study include a pairwise comparison questionnaire and the AHP hierarchy technique in the EXCEL software. The population of the study consisted of experts and managers of Mohandesi Sazan Company in Shiraz (10 individuals). Five members of the population were selected using snowball sampling method. According to the results obtained from analysis of data collected from 5 experts, the bargaining power of suppliers is the top ranking element in the competitive model. The results also showed that the primary activities transcend the support activities in the value chain model. The evaluation of the sub-criteria associated with the primary activities showed that marketing is the top-most priority among other sub-criteria while evaluation of the sub-criteria associated with support activities suggested that firm architecture outweighs other sub-criteria.

The purpose of the present study was to evaluate and compare the impact of "sanctions" and "mismanagement" on the implementation process of the National Petroleum Zones Company's facilities. The present study was applied in terms of deductive-inductive method and in terms of purpose. The statistical population includes all managers, deputies and experts of the National Iranian Oil Company (NIOC), including 200 people. The sample size was 131 using Cochran formula. The research instrument was a researcher-made questionnaire. AHP technique was used in this study. Also by paired comparisons and AHP method using Expert Choice software. For this purpose, using the hierarchical approach, the hierarchical tree was first formed using this method, then the alternatives were evaluated according to the criteria and then the factors based on the objective function were investigated and then using The hierarchical approach was first to form a hierarchy tree, and then to examine the options examined to evaluate and compare the impact of sanctions and mismanagement on the implementation process of the National South Oil Company's facility design projects, and to manage managers' knowledge, human resources management, and trans-organizational factors, respectively. , Ethical Behavior of Managers, Science and Ph Innovation, finance and banking, economics, logistics and commodities had a major impact on the implementation process of the National South Oil Company's facilities. Further mismanagement of the sanctions also affects the process of implementation of the National Petroleum Company's facilities.

In recent years, advances in various technologies have come with the help of the building industry and have not only mitigated some of the dilemmas but also introduced new solutions to the factors of construction . In this study, we evaluate the use of smartphones in manufacturing control and monitoring and develop a model of stakeholders and factors for this purpose. The data collection and analysis method included evaluation of research background, use of statistical questionnaire and hierarchical process analysis. Statistical analysis was performed using SPSS software and AHP was done by "Expert choice" software. The statistical population of the study consisted of 60 experts. At the end of the statistical section, 21 general criteria are identified. These criteria, along with seven different stakeholder groups that can be used in the use of smartphones to monitor manufacturing, have been analyzed through hierarchical process analysis. The results showed that three groups of stakeholders are more important. Among the identified criteria, three main criteria are structural resistance, compliance with national building regulations, and technical requirements. In the use of documentation such as photos and videos in the software, prioritizing the respondents in the software by the examiner based on the importance of each stakeholder, the user-friendliness of the software, and its ease of use are some of the solutions provided.