Objective The present report describes the results of four delphi surveys conducted within the quality improvement project My Logbook which aims to translate evidence-based standards for psychosocial care in pediatric oncology into a practical consensus-based tool. Methods In four consecutive delphi surveys a total of n=153 international, multi-disciplinary experts rated the content, method, and design of the different booklets of My Logbook which a local expert group had conceptualized. After each survey, the feedback was incorporated, and the changes were evaluated in a final consensus vote by the quality assurance panel of the PSAPOH. Results While some surveys led to a review on a page level, most booklets as a whole reached the consensus-level of approval. Over the course of the surveys, any revisions and comments were incorporated in the booklets, and approval rates increased steadily. Discussion The delphi surveys ensured the integration of multi-disciplinary, international expertise, uncovering issues such as language barriers and the need for a user manual that would not have been evident in first line. The incorporation of the input led to a continuous improvement of the tool, reflected in steadily increasing acceptance rates in the consecutive survey rounds. Conclusion The incorporation of the expert input as well as the additional development of a user manual resulted in a final version of the My Logbook apt for the interdisciplinary application in pediatric oncology in the entire DACH-region.