Reduction of Defect Rate in Bar Soap Manufacturing Process
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Abstract
The growth of bar soap industry leads to an increasing productivity improvement of bar soap manufacturing process to reduce the defect rate. The appropriated quality tools such as fish bone diagram and why-why analysis were adopted to find the cause of defect and to improve the manufacturing process associated with the brain-storming technique. The research objective is therefore to reduce the defect rate in the bar soap manufacturing process. Based on the current manufacturing process, it was found that the defect rate was caused by the belt conveyor. The data collection was conducted and analyzed to find the route cause using pareto diagram and found that the highest defect rates are caused by the clogging soap on the roller surface and the slipping guide behind the conveyor belt, respectively with the total defect of 8,837 kg (65.35 percent). Those two major causes were subsequently analyzed and created the plans to solve the problems, implement the plans, conclude the results, and finally set the standard procedures. After implementation, the result shows that the defect rate of bar soap manufacturing process is significantly reduce 8.8% from 12.5% to 3.7% per month (P < 0.05) whereas the quality rate is also significantly increased from 87.4% to 96.3% per month. The decreasing defect rate is achieved the target of the research purpose.
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ลิขสิทธ์ ของมหาวิทยาลัยเทคโนโลยีราชมงคลพระนครReferences
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