The company transforms its resources from organizational routines, whose theoretical approaches have enabled the understanding of business performance, since they carry with them the power of transformation. In this sense, this research sought to understand the reasons for variations in organizational routines, within the context of purchases of chemical inputs for an Institute of Technology and Innovation. The method chosen was the single case study. Data collection took place between 8/24/2015 to 1/29/2016 and was based on primary evidence, with interviews of 18 people, through a semi-structured script, in addition to the analysis of more than 30 documents and artifacts and empirical observations. The results suggest lack of integration and misalignment of interests, needs and concepts between the areas and participating actors, encouraging the maintenance of organizational routines with inadequate structures and foundations to serve all the purposes of the company. These problems have created a variation detrimental to business productivity. However, it also allowed the creation of new standards more adapted to the context and able to guarantee agility for purchasing routines, corroborating with the idea of positive flexibility in the organizational routines that cause endogenous change advocated by the theory. In this way, it is suggested to extend the level of commitment of the Organization to the business from the adequacy of the organizational routines of purchase, incorporating the new standards to encourage innovation of the institutional processes, in addition to providing the organization with the opportunity to obtain superior performance and competitive advantage.