This study aims a dual purpose: to delineate the framework of the key-factors that induces the organizations to realize internal training processes and verify its validity on the field. Therefore this article is divided into two parts. In the first six key-factors inducing to internal training are identified: workplace specificity, interactions, relationships and communication for learning objectives, person-centered learning, adult education, organizational strategies implementation, costs-benefits analysis of training. Then a working model for internal training is explained. In the second part the field study of internal training system of the Italian Revenue Agency is showed. The study confirms the assumptions of the first part with the exception of the factor "workplace specificity" that has some ambivalence.
Keywords: Internal training, key-factor, Italian Revenue Agency