Context: Research software is instrumental in producing research results. It plays a special role in advancing scientific discovery through tasks such as data analysis, simulation, and visualisation. However, despite its importance, the organisations that produce research software face challenges in managing research software projects. Existing frameworks for software engineering often overlook the needs of research software, including research software engineering practices and open science principles. Without clear guidance, organisations that produce research software must develop and invent new techniques for research software engineering, which is a slow and costly process. Objective: This work presents RSMM, a maturity model designed to improve organisational practices in research software project management. Methods: The initial version of RSMM was developed through a systematic literature review. Expert interviews were then conducted to evaluate and refine the model. Finally, multiple case studies were carried out to validate RSMM and demonstrate its applicability in real-world settings. Results: The final version of RSMM (v1.0) comprises 79 best practices, 17 capabilities, and 10 maturity levels, organised into 4 focus areas: ‘Software Project Management’ , ‘Research Software Management’ , ‘Community Engagement’ , and ‘Software Adoptability’ . We provide a comprehensive analysis of RSMM v1.0 and demonstrate its practical applicability through two illustrative case studies. Conclusion: The RSMM is designed to help organisations in evaluating and improving their research software project management by assessing a project’s current maturity level and providing best practices across four focus areas to guide its progression.

The growing usage of research software in the research community has highlighted the need to recognize and acknowledge the contributions made not only by researchers but also by Research Software Engineers. However, the existing methods for crediting research software and Research Software Engineers have proven to be insufficient. In response, we have developed FAIRSECO, an extensible open source framework with the objective of assessing the impact of research software in research through the evaluation of various factors. The FAIRSECO framework addresses two critical information needs: firstly, it provides potential users of research software with metrics related to software quality and FAIRness. Secondly, the framework provides information for those who wish to measure the success of a project by offering impact data. By exploring the quality and impact of research software, our aim is to ensure that Research Software Engineers receive the recognition they deserve for their valuable contributions.