Developed in 1958 Program Evaluation and Review Technique (PERT) method is being world widely used in project management as well as PERT diagram which is easy to draw with ConceptDraw PRO and all of the stencils in it and libraries full of symbols. In order to analyse the project time this kind of diagram is the best. It represents all connected tasks in process of their execution. There are two variations of PERT diagram construction. First one is AOA (activity on arrow) type. It represents the duration which is marked on arrow that connects the diagram nodes. Second one is AON (activity on node) type. It represents the task name itself, its duration, early and late starts as well as early and late finishes of this task. But no matter which of these two types you want to draw, you can always do it quick with no need of professional for helping you with it as you can become professional by simply using our product and improve your own skills.