This study aims to examine the role of school principals in improving educational quality based on the PDCA (Plan–Do–Check–Action) cycle. The study employs a qualitative method with a library research approach through the analysis of scholarly books, reputable national and international journal articles, and educational policy documents relevant to school leadership and educational quality management.The findings indicate that school principals play a strategic role as planners, implementers, evaluators, and agents of change throughout each stage of the PDCA cycle. The Plan and Do stages serve as the foundation for the systematic planning and implementation of quality improvement programs, while the Check and Action stages ensure continuous evaluation and improvement. The implementation of the PDCA cycle, supported by visionary, participatory, and adaptive school leadership, has been proven to strengthen a culture of quality within schools and enhance the quality of educational processes and outcomes in a sustainable manner.
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