abdolmehdi salehizadeh

It is obvious that the success of a project-based organization is dependent on its projects. A variety of tools such as the project excellence model, project management maturity models, the earned value method, have been developed in this regard, but there are still delays in projects because the projects have dynamic nature with non-linear relationships and feedback processes during the project life cycle. In this paper, we study the factors affecting the project management system in a project-based organization through system dynamics methodology and investigate the causal relations between them as well as the average cost and time variation of organizational projects during the time period. According to the analyses, the increase in each of the project quality or human resource efficiency is insufficient by raising the level of project management maturity or leadership maturity, but their concurrent increase and created synergy have a significant impact on the cost and time variation control. Furthermore, this research is contrary to the public perceptions under which the progress of projects depends on their funding. It is probably due to the maturity level of project management and the maturity of its leadership who takes measures for better management of costs and delays

Success of project-oriented organization and its future depends to achievement of goals of its projects. Alignment of projects to organization’s goals and roadmap and best selection of them with respect to limited resource is the main challenge of these organizations. Weighting of project prioritization indexes is based on politics that should support the all of organization's goals. There are tradeoff and conflict between politics and because of inherent delay in system, the result of implementation of them will be appeared in future. So we should simulate the result of implementation of politics to foresight the result of organization by best selection of projects. We use system dynamics approach to simulate and analyze implementation of politics of project portfolio management by VENSIM software. We used experts to approve the structure of model and relation between factors. These experts are from all of organization sections to all aspect of project portfolio management. For validation of simulation result compare the historical data with result of model for some of key variables. In this research we simulate the policies of project selection in a system dynamics model and the key variable and leverage factor of R&D project portfolio management system will be recognized based on analyzing the result of simulation and then we propose a model that we can achieve the best of organization goals.