<![CDATA[General Background Public service quality and responsiveness toward micro-business needs represent crucial operational priorities within regional government agencies. Specific Background At the Cooperative and Micro Business Office of Sidoarjo Regency, service delivery times require structured performance optimization to support local business upgrading. Knowledge Gap However, detailed quantitative evaluations measuring service process failures and sigma capability levels across diverse micro-business consultations remain necessary to establish international operational standards. Aims This study aims to improve the efficiency and effectiveness of service delivery at the Cooperative and Micro Business Agency in order to provide high-quality public services that are responsive to the needs of micro businesses. Results The quantitative evaluation using the DMAIC framework demonstrates a Defective Per Million Opportunities (DPMO) value of 27,083 and a sigma level of 3.43, indicating performance above the Indonesian industry average. Novelty This work combines Six Sigma DMAIC methodology with public administrative visitor service data to quantify bureaucratic process capability and formulate structured optimization strategies. Implications The findings provide practical guidelines for public sector institutions to reduce service waiting times, eliminate operational waste, and achieve professional excellence. Key Findings Highlights The Six Sigma DMAIC analysis successfully identifies eight specific service categories causing prolonged waiting times for micro-business visitors. Quantitative calculations reveal a DPMO value of 27,083 and a sigma level of 3.43 for the regional cooperative agency. Structured improvement and control recommendations establish actionable pathways to minimize service delays and elevate public service quality. Keywords Six Sigma, Dmaic, Dpmo, Dpo, Public Service]]>
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