Conceptualising boundary work activities to enhance credible, salient and legitimate knowledge in sustainability transdisciplinary research projects

Transdisciplinary research (TDR) is one method where scientific and societal actors, each with various backgrounds, collaborate to address complex problems through knowledge co-creation. Despite its widespread use, TDR still lacks a common definition and methodology which makes it challenging to define clear mechanisms for knowledge co-creation that facilitate impact. Many authors across complementary bodies of literature provide lists of principles, best practices and approaches for TDR, but in practice these are rarely applied consistently. In this conceptual paper, we fill this gap and increase methodological coherence for sustainability TDR by consolidating these bodies of literature into a list of suggested activities for scientists and practitioners across contexts to apply to enhance the impact of their work. We consolidate primary and secondary literature from the fields of TDR, sustainability, research impact, stakeholder engagement, project management, boundary work and knowledge systems with our own practical experience in sustainability TDR projects. This synthesis leads to our conceptual and analytical framework of twelve boundary work activities that enhance credible, salient and legitimate (CSL) knowledge. Our assumption is that if boundary work activities are successfully implemented across the phases of a TDR project and enhance CSL knowledge, then there will be cascading effects that support a higher likelihood of knowledge use and outcomes that lead to impactful sustainability transformations.