Pile defect quality control analysis on construction company in East Java

A production process has a possibility of product defects; the types of defects commonly found in pile products are porous concrete defects, dented joint plate defects, pile dimensions deviation defects, etc. The defect of the product needs to be controlled because it can cause losses to the company. Therefore, in this study, data processing was conducted on pile defect products using statistical process control. An analysis was then performed using the Pareto Chart to determine the types of defects that occur most often. After that, identifying the problems causes that occur in terms of man, machine, method, materials, money, and environment by using fishbone diagrams; so that recommendations for improvement can be given to the company. The results showed that, based on the Pareto principle, 80% of the defects types that occur include the type of porous concrete defects, the type of dented sheath plate defects, and types of joint plate dimension defects. The type of defect with the highest frequency is a porous concrete defects type. Recommendations for improvement that can be given include providing training to workers, maintaining machinery, improving product quality, and providing alternative electrical energy sources.