The training within the Moroccan company still faces the challenge to reach a real added value and demonstrate that the costs incurred are investments directly related to performance. Quantitative classic indicators should be enriched by other more qualitative informing on the adequacy of training in relation to actual needs and the company's need. Quantitative and / or qualitative, to address these issues, we discussed the framework of theoretical analysis and the regulatory framework for the practice of training on the job in Morocco. Then we conducted a survey of a sample of public construction sector first, in order to know the level of development of training and modalities within these companies and assess the effectiveness across modes evaluation of training used by their managers.