การลดความบกพร่องในการะบวนการตรวจสอบคุณภาพของโรงงานเครื่องประดับ

Abstract

The objective of this research is to reduce defects in the quality inspection process of the jewelry factory. In the inspection process there are 3 major processes. Which are receiving, inspecting, and completing processes. The research started from observing the factory, production, and quality control process, after that used cause and effect diagram to find the causes of defects in the inspection process. We gathered the information on various products from what was being sent back for rework after the quality inspection process. With the use of Pareto diagram we defined products that need to be improved for the inspection process, Three products will be chosen for study and process improvement. The set up team began to brain storm using Failure Mode and Effect Analysis (FMEA) to find defects in the inspection process. Then evaluation of the risk Priority Number (RPN) of each cause was done. The RPN score over 40 points were selected for corrective action. For this research the implemented action was to distribute the checking tool and set up standard work instructions to reduce defects in quality inspection processes which mostly use visual inspection. After implementation and re-evaluation the RPN scores reduced from 514 to 136, a reduction of 73.54%. Moreover the amount of defects in quality inspection process reduced from 0.54% to 0.17%. Failure Mode and Effect Analysis (FMEA) has provided a technique to identify cause and effect of defects, brought about the solution to reduce critical defects that suitable for organization.