Mina Farshbaf Zirakkar - Graduated of Industrial Engineering Tabriz,
Naeimeh Salimi

This paper describes the use of system dynamics models for managing projects based on PMBOK standards. System Dynamics is an effective method for studying dynamicconditions and changes in complex systems. It bas been used in domain of social, economic and human activities which deal with vague andinaccurate variables. In fact it has been used to address practically every sort of feedback system including project management.In this paper , we'll present a structure of managing project based on PMBOK and show bow system dynamics model can be used to enhancethe productivity and cause improvement in managing project. The effects of time & cost-varying, project team size, of capital andconsumer resources, of quality-varying are incorporated in our model. Then relations among the variables are discussed by using system dynamic method and developed by using Vensim PLE application software (Ventana 2005) [23], [25). Results indicate that, this model allows managers to forecast cost and time overruns and the quality of project on the basis of limited numbers of inputs describing the initial conditions. In particular the model shows some important managerialdirections about monthly revision, time and cost controlling and other main aspects inferring the project managing based on PMBOK

System dynamics, PMBOK, Projed ltlllnagement, time &: cost varying, Improvement