“Good judgment is the result of experience,” he said. “The way to become a good project manager is to have bad experiences and learn from them. » A review of the literature revealed three categories of knowledge regarding the contribution to the success of earned value management. An extensive literature provides rational support for the positive contribution of EVM [48], [50]. Work of this type suggests the benefits of EVM in key project management processes including planning, execution, monitoring and control (PMBOK, 2004). Another source of knowledge comes from the experiential accounts of project practitioners [49]. This work is important in that, unlike theory, it offers empirical evidence based on experience and personal observations. A third source of knowledge on the contribution of EVM to project success blends both theory and experience [48]. This work offers the highest level of precision in both its methodology and its results and can be considered to offer scientific knowledge. The work in this category is research-oriented and to date relies on a qualitative method to report