Analysis &Quality Improvement by using Quality Seven Tools Method & SEM PLS Analysis: A Case Study Market Defect Door Foam Shrinkage of Refrigerator Product

Abstract

Quality improvement activities are very important for companies in order to improve customer satisfaction. If any defective product is received by the consumer, it will reduce the value of customer satisfaction. One of the tools to analyze and improve quality problems is QC seven tools. QC seven tools method used to analyze and improve the market defect in the company PT XYZ. The problem was door foam shrinkage of refrigerator product at the period 2017-2018. Result of analysis obtained six root causes that is high rate of shrinkage urethane material, less amount of urethane material, low density urethane, output charging shape of urethane uneven, low jig temperature and making the inner door holes by manual. Others method used that are of statistical analysis are using SEM PLS software smart PLS. The results of the analysis gained two significant cause of low polyurethane/density (MP) and low jig temperature (TJ). Smart PLS Analysis results according to the QC seven tools, indicating that the statistical analysis can be applied to analyze the quality problems in the company PT XYZ so that becomes effective activities. The results of this activity can reduce the market defect from 0076% to 0.002% or decrease 97.47%.