ANALYSIS OF PRODUCT QUALITY BOGIE SET S2HD9C USINGSIX SIGMA AND FMEA METHODAT PT. BARATA INDONESIA (PERSERO)

Abstract

Product quality is critical for businesses to survive and thrive in the marketplace.
Likewise with PT. Barata Indonesia (Persero), which always wants to provide good

product quality for customer satisfaction, PT. Barata Indonesia (Persero) is a State-
Owned Enterprise (BUMN) in the manufacturing sector, which has a business line in

the foundry or foundry sector, one of which is the production of train components.
The company's difficulty is that there are still problems in producing the S2HDC bogie
set, such as break mold, porosity, slag, and crack. This study aimed to analyze the
quality of the Bogie Set S2HD9C product using the six sigma method and propose
improvements using Failure Mode and Effect Analysis (FMEA). The research results
found that the percentage of defects that occurred during August 2022 - January 2023
was porosity of 40.38%, break mold of 30.77%, crack of 17.31%, and slag of 11.54%.
To obtain an average DPMO of 14191 with a sigma value of 3.69. The causes of these
defects are caused by human, material, machine, method, and environmental factors.
From the FMEA analysis, the defect's cause is the highest RPN value of 392, with the
proposed improvement to closely monitor the cleaning process and recheck the core
box in every process that will use the mold.