Abstract
This study investigates the performance excellence of a school in Gumaca, Quezon, using Six Sigma methodologies through a descriptive-evaluative research design. Data were collected from teaching and non-teaching staff via a structured questionnaire, validated by experts, and analyzed using frequency counts, mean scores, and the Kruskal-Wallis H-Test. Results indicated high performance in key areas such as top management support, customer relationships, and workforce management, with the highest-ranked indicators being the clarity of quality goals and engagement with students. However, significant areas needing improvement were identified, including the formal planning processes for quality improvement projects and the measurement of external student satisfaction. The Kruskal-Wallis H-Test revealed no significant differences between teaching and non-teaching staff perceptions, indicating a consistent view of Six Sigma's effectiveness across different roles. Based on these findings, several recommendations are proposed to further enhance the school’s performance excellence. These include developing a more formalized planning process for quality improvement projects, establishing effective student feedback mechanisms, re-evaluating supplier management practices to focus on high-quality suppliers, offering more focused training in basic statistical techniques, and ensuring that quality data is readily accessible to all staff members. Implementing these recommendations can help the school leverage Six Sigma methodologies for continuous improvement and long-term success.