This research paper aims to present a dynamic model in the project planning process that is characterized by simplicity and effectiveness, taking into account the internal and external conditions of the project, storing the practical experience and using it later in the subsequent planning processes. The proposed model consists of several entities that have their own independent properties. These entities are linked with each other by bilateral relationships that measure the effect of each one on the other. The proposed model takes into account the different working conditions that may arise during the implementation process. The model has demonstrated possibilities for resource allocation, risk management, forecasting, dynamic planning based on different scenarios, and studying the effectiveness of implementation and the resources usage.