Table 6 Five adaptation components cluster model. Clusters shown in Table 6 can be roughly summarized as the following: Cluster 1: unplanned program content changes for a variety of reasons that could go against study protocol. Cluster 2: Planned program content changes early on to improve outcomes. Cluster 3: Unplanned changes to practice processes (recruitment and scheduling) early on to improve reach/engagement. Cluster 4: Unplanned implementation changes of various sorts for the reason of improving feasibility that happened throughout implementation. Cluster 5: Unplanned reactionary changes throughout the implementation to study personnel. Cluster 6: Unplanned changes to a variety of process areas with the goal of improving feasibility through the implementation process

From: Methods for capturing and analyzing adaptations: implications for implementation research