Quality Improvement Proposal of Spun Pile Using Six Sigma Method at PT. Adhi Persada Beton

Abstract

is a subsidiary of PT. Adhi Karya (persero) tbk, which produces precast concrete, including spun pile. There was a problem in spun pile production; the average percentage of spun pile defects was 0.71%, exceeding the company standard, which was 0.5%. Therefore, this research was conducted to analyze the defect and provide improvement proposals to reduce the defective products. Five dominant defects that occurred were fin, chipped, sticky skin, curved, and broken. Based on the Spun Pile production process analysis, the DPMO of 617, and sigma level value of 4.73. Based on these criteria, the improvement proposal will be evaluated. The apriori algorithm indicated two defects have a strong combination relationship; they are Curved and Sticky Skin. Another defect prioritized to solve is Fin, the second-highest RPN from FMEA analysis. The use of rust remover can make the improvement proposal given to overcome fin defects. The use of mold cleaning forms is to overcome sticky skin and curved caused by unhardened concrete using a Thermocouple on steaming tubs. This research can only be carried out until the improvement stage because the proposed improvements cannot be implemented due to the lockdown situation at the factory.

Enhancing Quality Control of Packaging Product: A Six Sigma and Data Mining Approach

“…Each dimension provides a lens to evaluate a product's ability to satisfy customer expectations and adhere to manufacturing criteria [2], [7]. e Six Sigma method embodies a philosophy of perpetual improvement in product quality and production processes [8]. It is a systematic approach aimed at minimizing variability and reducing defect rates, with an ambitious goal of limiting failures to 3.4 per million opportunities, essentially pushing for near-perfect quality [9].…”