Background: The capability of consumers and staff may be critical for authentic and effective partnerships in healthcare quality improvement (QI). Capability frameworks describe core knowledge, skills, values, attitudes, and behaviours and guide learning and development at individual and organizational levels. Objective: To refine a capability framework for successful partnerships in healthcare QI which was coproduced from a scoping review. Design: A two-round eDelphi design was used. The International Expert Panel rated the importance of framework items in supporting successful QI partnerships, and suggested improvements. They also rated implementation options and commented on the influence of context. Participants: Seven Research Advisory Group members were recruited to support the research team. The eDelphi panel included 53 people, with 44 (83%) and 42 (77. 8%) participating in rounds 1 and 2, respectively. They were from eight countries and had diverse backgrounds. Results: The Research Advisory Group and panel endorsed the framework and summary diagram as valuable resources to support the growth of authentic and meaningful partnerships in QI across healthcare contexts, conditions, and countries. A consensus was established on content and structure. Substantial rewording included a stronger emphasis on growth, trust, respect, inclusivity, diversity, and challenging the status quo. The final capability development framework included three domains: Personal Attributes, Relationships and Communication, and Principles and Practices. The Equalizing Decision Making, Power, and Leadership capability was foundational and positioned across all domains. Ten capabilities with twenty-seven capability descriptions were also included. The Principles and Practices domain, Equalizing Decision Making, Power, and Leadership capability, and almost half (44.4%) of the capability descriptions were rated as more important for staff than consumers (p <.01). However, only the QI processes and practices capability description did not meet the inclusion threshold for consumers. Thus, the framework was applicable to staff and consumers. Conclusion: The refined capability development framework provides direction for planning and provision of learning and development regarding QI partnerships. Patient or Public Contribution: Two consumers were full members of the research team and are coauthors. A Research Advisory Group, inclusive of consumers, guided study execution and translation planning. More than half of the panel were consumers.