The national government of the Netherlands has mandated heat transition to the municipality as part of the global execution of climate agreement. However, despite many guides has been offered, municipal heat-transition policy is a tricky matter that the municipal policy-makers struggle to grasp. To support the systematic municipal heat transition policy-making process, we propose the usage of a Decision Support System (DSS) that serves the whole cycle of policy-making. However, there is a knowledge gap of an integrated DSS framework with both policy target profiling and policy system (policy cycle) that is a context-specific for the municipal heat transition policy-making in the Netherlands. Therefore, this thesis study was conducted to answer the research question: "what decision support system framework can systematically assist municipalities in the heat transition policy-making process?" To answer this question, a refined Heat Transition Policy Making (HeTPoM) DSS framework is made based on a functional visual design method to cater to the needs of DSS creation in the context of municipal heat transition policy-making in the Netherlands. The refined HeTPoM DSS framework is designed to support policy-makers to create a systematic municipal heat transition policy by supporting the process of policy design, assessment, and evaluation. Furthermore, the refined HeTPoM DSS framework can potentially be used as a base to create a computerised municipal heat transition policy-making DSS. This then leads into two types of future research recommendations that need to be done in series. First is the HeTPoM DSS framework components mechanism study (i.e. the interaction between municipal heat transition influencing factors and the policy-making process). Which then can be followed by digital architecture of the DSS system to support the development of municipal heat transition DSS.