Application of Six Sigma Techniques to Enhance Quality Control Efficiency: A Case Study of Medium-Sized Industrial Enterprises in Southern Thailand

Abstract

The purpose of this research was to 1) examine the current state of quality control processes in medium-sized industrial enterprises in Southern Thailand, 2) apply the Six Sigma methodology using the DMAIC approach (Define, Measure, Analyze, Improve, Control) to enhance the quality control processes, and 3) evaluate the changes in production efficiency following the implementation of Six Sigma. This qualitative study employed in-depth interviews and focus group discussions to collect data from stakeholders involved in the organizations’ quality control processes. The findings revealed that 1) most participants possessed only a basic understanding of Six Sigma and lacked the skills to apply statistical tools at each phase of the DMAIC cycle; 2) the application of Six Sigma techniques via the DMAIC framework led to significant improvements in the production process, including reduced defect rates, lower production costs, increased labor efficiency, and enhanced product quality; and 3) following the implementation of Six Sigma, the quality control process became more effective, enabling the organization to minimize production losses, better manage costs, improve labor productivity, and consistently maintain high standards of product quality.