Given the current scenario of constant organizational changes, many authors have been dedicated to study and research in project management, aiming to contribute to the process of changes implemented through projects. Based on the assumption that communication is the arena in which people and the organization itself can create meaning (WEICK, 1995), this dissertation aims to understand how communication is perceived by individuals and how it affects the processes of creation of sense when these individuals participate in a process of organizational change brought about by an implementation project of an ERP - Enterprise Resource Planning. A field survey was carried out by taking an ERP implementation project as a case study. The communication of the project was analyzed first from a positivist perspective, and later a counterpoint was made, in which the present work has deepened, with an interpretative perspective, using the theoretical model proposed by the Montreal School. The results of the research evidenced the importance of the role of communication as constitutive of the project and of the organization itself (TAYLOR and CASALI, 2010).