This mixed methods landscape analysis by the MOMENTUM Routine Immunization Transformation and Equity project reviewed the evidence on microplanning, with a focus on the drivers of implementation and institutionalization of it in routine immunization programs. The project also sought to understand whether adaptations to microplanning, including digital and for integrated health services, helped overcome any of the known challenges. The primary objective of this analysis was to identify, synthesize, and disseminate evidence related to the drivers of implementing and institutionalizing microplanning in routine immunization programs.