Changes in the Software requirements, technological advances require flexibility in software system development. Unexpected changes and mistakes cause difficulties. They effectively manage destructive changes, rework, and errors; project managers need to consider dynamic behavior loops of feedback on lead delays and disturbances. System Dynamics (SD) modeling methods have been used in the last few decades to meet this demand for analytical and project performance improvement. The SD model is used to improve the simulated change management policy for the Iranian project in the project's planning and petrochemical industry. Dynamic simulations of the SD model. The results show that effective Knowledge Management (KM) is a crucial control factor for the project's mechanically essential controls. Therefore, the proposal on the Knowledge Management aspect and attempts are to improve the manufacturing industry model. Effective formulation of dynamic simulation models project change management policy, time, consider Cost, quality, resources, and financial indicators. This model, such as financing, outsourcing activities, adjustment of the schedule, labor management, etc., to compare the alternative change management strategy in terms of the project's performance indicators to enable the decision-makers.

软件需求的变化，技术的进步要求软件系统开发的灵活性。意外的更改和错误会带来困难。他们有效地管理破坏性的变更，返工和错误；项目经理需要考虑对铅延迟和干扰的动态反馈行为循环。在过去的几十年中，已经使用系统动力学（SD）建模方法来满足这种对分析和项目性能改进的需求。SD模型用于改进项目规划和石化行业中伊朗项目的模拟变更管理策略。SD模型的动态仿真。结果表明，有效的知识管理（KM）是项目机械必要控制的关键控制因素。因此，关于知识管理方面的建议和尝试是为了改善制造业模型。动态模拟模型的有效制定可用于项目变更管理政策，时间，考虑成本，质量，资源和财务指标。这种模型，例如融资，外包活动，时间表的调整，人工管理等，可以根据项目的绩效指标比较替代变更管理策略，以使决策者能够使用。