IMPLEMENTATION OF THE PLAN-DO-CHECK-ACT (PDCA) METHOD IN CONTROL OF CHEMICAL PRODUCT DEFECTS IN XYZ COMPANY

Abstract

This study aims to analyze the application of the Plan-Do-Check-Act (PDCA) method in controlling chemical product defects at the XYZ chemical company. Data were obtained from production reports from January–March 2025 with a total production of 5,569 units and a total of 124 defective units. The method uses PDCA with a quantitative descriptive approach with Pareto analysis and cause-and-effect diagrams in identifying the root causes of defects. From the Pareto calculation, it shows that dent defects amounting to 31% are the main contributor to defects. The causal factors come from human aspects where carelessness, handling not according to standard procedures and lack of supervision result in dents. This PDCA implementation provides an overview of the problems that occur and is oriented towards final inspection. It is necessary to improve operator competence in understanding the production process to reduce the defect rate sustainably.