The constant need of organizations to develop their operations with competitiveness, effectiveness and efficiency has marked the need to think and manage them with an integrated system, however, a company faces many challenges when simultaneously operating the requirements of several systems, and it is here where the literature does not offer more help or technical information. In this sense, this article makes a systematic review of the year 2015 publications, in order to make an approach to the success factors, restrictions, methods and characteristics of an integrated management system. It is concluded that, from an operational perspective, the integration of management systems lies in the combination and alignment of all internal management practices in a single system, i.e., in a global management system. It would be understood that integration exists if the 14 conditions listed in the conclusions of this research are met.