This study aims to describe, analyze, and interpret the role of multi-set data consistency in regional development planning in Kebumen Regency, Central Java Province, Indonesia. This study uses qualitative research methods. The selection of informants used purposive and snow-ball sampling. Data collection uses in-depth interviews, observations, and documentation. Data analysis was carried out through open coding, axial coding, and selective coding procedures. The validity of the data is determined through an examination technique based on the criteria of credibility, transferability, dependability, and confirmability. The results of the study show: (1) Regional development planning policies, which regulate the process and stages of the preparation of regional long-term development plans/RPJPD, regional medium-term development plans/RPJMD, and regional development work plans/RKPD were developed in the process of preparing the three regional development planning documents of Kebumen Regency to meet local needs; (2) The process of preparing the 2005–2025 RPJPD, 2006–2010 RPJM, 2010–2015 RPJMD, and 2006 to 2014 RKPD uses a technocratic approach that emphasizes the importance of multi-sector data (3) Factors that affect the process of preparing and documenting regional development planning documents are compliance in the hierarchy of multi-sector existing data administration, the development of regulations for the implementation of regional development planning policies, the existence of existing multi-sector planning data documents national, provincial, and regional development documents related to development planning, as well as the use of technocratic approaches; (4) The 2010–2015 RPJMD is inconsistent with the 2010–2015 RPJPD.