Recently a strong increase in R&D investment has encouraged a firm to create a more effective and efficient R&D process, which allows it to save time and costs significantly. In order to build such a process, a firm should be able to evaluate its process, based on which the process can be improved. With all its importance and value, however, the previous studies on R&D process have seldom focused on the method of evaluating the process. Therefore this study aims to develop a framework for evaluating R&D process. For the purpose, CMMI (Capability Maturity Model Integrated) is used as a main method, which is a process improvement approach that provides organizations with the essential elements of effective processes that ultimately improve their performance and thus considered suitable for this research. We tried to develop a framework for evaluating R&D process based on the CMMI approach by modifying it to be suitable for measuring R&D performance where the essential elements for effective R&D process are obtained from the literature on best practices. A simple case study was conducted to illustrate how the proposed framework could be applied. The research results are expected to guide R&D process improvement across a project, a division, or an entire organization.