Micro and Small Enterprise (MSEs) are the primary employment driving force in Peru; however, their low level of management does not allow for their long-term sustainable development. This situation has led such companies to incur unnecessary costs and expenses. In this study, we deal with the case study of a microenterprise of services in the personal beauty sector, which applied a Management Model based on define, measure, analyze, improve, and control (DMAIC) method. That excellent methodology helps to improve processes through the philosophy of continuous improvement, with the aim of proposing improvements to increase profitability and growth. Moreover, the integration of various techniques and tools at each stage of the DMAIC methodology was proposed with a focus on human management processes, inventories, and operational services, which have greater impact on most companies of this type.