In a competitive and dynamic business era, contractor performance management is crucial for achieving operational efficiency and competitive advantage. This research aims to develop a conceptual framework to enhance contractor management and performance, addressing a key challenge in the business sector, which is the availability of electric locomotives (ellocos) performance in GBC mine in PT Freeport Indonesia. By adopting the DMAIC (Define, Measure, Analyze, Improve, Control) approach, this study outlines systematic steps beginning with a deep understanding of user needs and expectations regarding contractor performance. The study employs a qualitative method to identify the root causes of the decline in elloco performance through the analysis of contractor management and performance. The DMAIC approach is applied to improve contractor performance, with periodic monitoring every six months or annually. Data is collected through observation, unstructured interviews with supervisors, and documentation. Data analysis is conducted using the Miles and Huberman model with a triangulation approach to ensure the validity and reliability of the findings. The results indicate that implementing this conceptual framework provides clear and effective guidance for organizations in enhancing contractor performance. The use of the DMAIC approach ensures that each step in the research process is carried out carefully and systematically, helping organizations address the challenge of ellocos performance availability and achieve their business goals. The implementation of this conceptual framework is expected to improve contractor performance and well-being in the dynamic business context.