This subdomain includes the roles of individuals involved with implementing, delivering, and/or receiving the innovation. Terms for implementation and innovation roles are used inconsistently and sometimes synonymously in the literature (T. Greenhalgh, Robert, et al. 2004); as a result, it is important for each CFIR user to clearly define roles for each project. Each of the roles listed below may reside in the Inner or Outer Setting. For example, blended implementation facilitation approaches involve Implementation Facilitators who may be affiliated with a centralized entity in the Outer Setting and who partner with an Implementation Lead in the Inner Setting (S. N. Smith et al. 2020). In addition, roles are not mutually exclusive, e.g., an Implementation Lead may also be a Mid-Level Leader.