<p>This work investigates the contributions of the MES – <em>Manufacturing Execution System</em> – for improving the competitive priorities of manufacturing. We present a theoretical framework on the information technologies (IT) and its business importance, the contributions of the organizational factors for the implementation of the MES, as well as the main concepts and the possible applications of this tool. The built theoretical framework was decisive to subsidize the research performance in the studied company. It was verified that the MES significantly contributed to the manufacturing relating to improvement cost, quality, flexibility, conformity and reliability. It was concluded that the MES improved the information quality generated...