Quality control does not concern only to a finished product, nowadays measuring technologies control all the fabrication process in an active way. If product quality does not meet the customer specifications exists the risk of even lose projects. When multiple or complex operations are required in the fabrication process of a part and its dimensional validation is primordial and also happens that the operator has doubts about which step to follow or that the expert supervisor is not at the workshop for some reason, that is why comes the opportunity of implementing Augmented Reality (A.R.) technology in education and in a lean manufacturing process, as support for technician operators of machine-tools and coordinate-measuring machines, with the objective of helping the technician to perform, in a proper and timely manner, the step sequence of the process. It was proved that having A.R. as ally in the technician's education, the mistakes and time required to fulfill the machining and dimensioning of a part can be considerably reduced, as well as eliminate operator's dependency to the experts. At the end of the implementation, savings were found in the three stages analyzed, generating 27.36% savings in lathe process, 26.54% in milling and 45.16% in dimensional validation.