Quality control of garment product using DMAIC Six Sigma

Tiara Cahyaning Tyas, Ida Giyanti

Sari


Quality control is intended to ensure that the products are in accordance with the predefined standards. PT. XYZ is a garment company that manufactures products with a global target market so that product quality assurance is very important. This research focuses on the Just Brand-MCJA216142 jacket product at the sewing work station on line-4 of PT. XYZ. Preliminary observations during the July 2021 period show that the number of reworked-products is experiencing an increasing trend. This study aims to determine whether the company has carried out quality control properly. Specifically, the research objectives are to identify the type and level of product defects, identify the factors causing product defects, and provide proper improvement suggestions to reduce the occurrence of product defects. The method used is Six Sigma with the DMAIC (Define–Measure–Analyze–Improve–Control) concept. The results showed that the quality of the Just Brand-MCJA216142 jacket product has exceeded the Indonesian industry average and is classified as the USA industry average, but quality improvement is still need to be ed because the products are targeted for the export market. The results of the Pareto diagram at the Analyze stage found that the most dominant defects that occurred in the Just Brand-MCJA216142 jacket production process were broken threads and puckering with the frequency of occurrence reaching 23% of the total 16 types of defects. The defects were caused by human, machine, material, method, and environmental factors. Recommendations for improvement at the Improve stage are based on root cause analysis of each causative factor identified using a fishbone diagram. This research results strengthen the previous related researches regarding the effectivity of DMAIC Six Sigma for analyzing quality control of products.

Kata Kunci


Pareto Diagram; Fishbone Diagram; DMAIC; Quality; Six Sigma

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Referensi


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DOI: https://doi.org/10.31315/opsi.v17i1.7107

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