<p>In the beginning of article situation of Iran&#39;s completed development projects and specially dam projects in order of constructing duration and cost has been discussed also basic concepts of value Engineering has been explained. Essential, potentials and purposes of studying value engineering in dam projects also challenges in this way that has been collected by questionnaire from ideas of high level managers and experts in dam structuring is a matter of discussion. The results shows us inappropriate situation of managing cost and time of constructing the projects that could been easily fixed by using the technique of value engineering, but unfortunately for many reasons such as flaws in Iran&#39;s law, slight politics of government, structure cultures of society, common ways of making dam project contracts, weakness in funds of clients, insufficient knowledge about value engineering and etc.</p>