Currently, it is increasingly important for a company to stand out, ensuring greater competitiveness in its market. Regardless of the field of activity, actions aimed at improving services and/or products, which enhance (i) service quality, (ii) competitiveness, and (iii) market penetration, are increasingly valued. In this scenario, testing and calibration laboratories (TCL) seek to maintain and increase the quality of their services, which is reflected both in customer satisfaction and in obtaining and maintaining accreditation. Thus, this dissertation aims to propose a hybrid model (Kaizen and Lean Six Sigma) for evaluating continuous quality improvement for testing and calibration laboratories, contributing to the improvement of processes and analyses conducted in TCL, aiming at both cost and waste reduction and ensuring post-accreditation quality. To this end, a survey was conducted with professionals working in different TCL sectors in order to obtain a profile of the challenges associated with their quality. The results obtained allowed the calculation of the maturity level of each analyzed requirement, identifying the Personnel requirement as the highest priority (lowest maturity). Based on the results, both a continuous quality evaluation model to be employed in TCL and quality management recommendations were proposed.