Abstract:
The objective of this research is to improve quality production rate of synthetic staple fiber process by focus on reducing the amount of non-quality products included waste that generate in the process. The research was collected the data from December 2019 to October 2020 and shows the frequency of problem by Pareto chart. Then, using brainstorm with colleague to analyze the cause of problem for make cause and effect diagram. Next evaluate the problem by using Failure Mode and Effect Analysis (FMEA) that consist of Severity, Occurrence and Detection and calculate a Risk Priority Number (RPN) to arrange the rank of problem, which have the most affected for quality production rate. RPN score shows the factor that has the highest score are 1) Quench Air is uneven and 2) Movement of Tow can and Roller is not related. The result of improvement presents the good quality rate increased from 92.97 percent to 95.79 percent. Moreover, non-quality rate and waste was reduced from 7.03 percent to 4.21 percent. Thus. the profit was increased to 130,892.63 baht per month when producing 93 ton per day. From this result the company in this case study was increased production capacity to be 96 ton per day.