A study on the effective management by the quality control technique concerning the PCB detoxification plant

摘要

This study is on the effective management by the quality control technique concerning the PCB detoxification plant. The DMAIC Method (Define, Measure, Analyze, Improve, and Control) was applied to the actual construction permission procedure for the purpose of shortening of the construction permission period of a PCB detoxification plant. Firstly, the delay of Lead Time (LT), i.e., the duration period of the expert meetings is considered to be a defect in products, and a rate of defect (R%) was defined. Next, based on the failure mode effects analysis, Risk Priority Number (RPN) was calculated and the intensity of impact of the factors, which causes a defect, was evaluated. By execution of actions recommended in order to prevent the risk of the delay of LT, all RPN became less than 120 after the second expert meeting and the third expert meeting became the final meeting. Finally LT, which had required about ten months conventionally, was shortened to 4.5 months, and as a result, R = 15% was obtained. Consequently, although quantification has been considered very difficult in the field of the construction management concerning a project until now, our study showed that this methodology is effective even in that field.