The purpose of this study was to establish the appropriateness of a comprehensive model for curriculum planning in the Kingdom of Saudi Arabia, including its processes and procedures. The researcher employed a descriptive approach. The researcher created a curriculum planning model containing the objectives, foundations, procedures, and a visual schematic diagram illustrating the 14 specialists' responses. They demonstrated the model elements' suitability for curriculum development by a very high agreement rate of 100%. The average proportion of procedures for each planning process was 100%, and the average percentage of suitable procedures for each process was 99.4%. The average ratio of procedures incorporated into the planning process was 100%. The research concluded that the curriculum planning methodology is appropriate for the Kingdom of Saudi Arabia's public education planning. The study advises that curriculum planners utilize curriculum planning methods.