Product Quality Control Analysis Using the Six Sigma Method with Statistical Process Control [SPC] Data Presentation


Authors : Femas Kurniawan; Fredy Setiawan Wibisono; Adriyan Akbar Hidayat; Wildhan Fakhri Novian

Volume/Issue : Volume 10 - 2025, Issue 1 - January

Google Scholar : https://tinyurl.com/3vex3k3s

Scribd : https://tinyurl.com/3j9umen7

DOI : https://doi.org/10.5281/zenodo.14621474

Abstract : PT. XNI is a company that operates in the automotive manufacturing sector, especially in the production of motorbikes. Motorcycle products from PT. XNI is the one that dominates the motorbike sales marketing market with the most users currently in Indonesia. This research aims to reduce NG [Not Good] products in engines, as well as research controlling the quality of engine products from motorbikes so that they continue to improve and of course have quality. The method used is using the SIX SIGMA method, namely by Define, Measure, Analyze, Improve, Control and presenting data using Statistical Process Control (SPC). Month 1 The first week produced 5925 units, while the second, third, and fourth weeks saw slightly lower production, 5909, 5903, and 5911 engines respectively. seen from the significant decrease in the number of rejected products, namely from 5% in the first week to 3.91% in the fourth week and the 2nd month, first week 1.075%, second week 0.874%, third week 0.807%, fourth week 0.536 with respective production results - 5956, 5948, 5952 and 5968 engines respectively. The results of the analysis from week 1 to week 4 between months 1 and 2 show that the large number of reject products is caused by several factors, namely the quality of raw materials, namely motorbike parts, errors in the production process, errors from operators, problems with machines or work equipment. By minimizing or managing the factors above, companies can reduce the number of rejected products and improve overall production quality.

Keywords : Manufacturing, Quality Control, SIX SIGMA, DMAIC, SPC.

References :

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PT. XNI is a company that operates in the automotive manufacturing sector, especially in the production of motorbikes. Motorcycle products from PT. XNI is the one that dominates the motorbike sales marketing market with the most users currently in Indonesia. This research aims to reduce NG [Not Good] products in engines, as well as research controlling the quality of engine products from motorbikes so that they continue to improve and of course have quality. The method used is using the SIX SIGMA method, namely by Define, Measure, Analyze, Improve, Control and presenting data using Statistical Process Control (SPC). Month 1 The first week produced 5925 units, while the second, third, and fourth weeks saw slightly lower production, 5909, 5903, and 5911 engines respectively. seen from the significant decrease in the number of rejected products, namely from 5% in the first week to 3.91% in the fourth week and the 2nd month, first week 1.075%, second week 0.874%, third week 0.807%, fourth week 0.536 with respective production results - 5956, 5948, 5952 and 5968 engines respectively. The results of the analysis from week 1 to week 4 between months 1 and 2 show that the large number of reject products is caused by several factors, namely the quality of raw materials, namely motorbike parts, errors in the production process, errors from operators, problems with machines or work equipment. By minimizing or managing the factors above, companies can reduce the number of rejected products and improve overall production quality.

Keywords : Manufacturing, Quality Control, SIX SIGMA, DMAIC, SPC.

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