The Application of Six Sigma in Product Quality Analysis (Case Study: Handprint Batik of PT X di Bali)



By : Tri Alit Tresna Putra

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Faculties : Fakultas Matematika dan Ilmu Pengetahuan Alam

Department : S1 Matematika

The increasingly fierce industry competition encourages the companies provide the best goods and services for their customers. One of the ways to win this competition is by providing product quality control before fall into the hand of customers. A good quality control will be expected to satisfy the customers for what they bought. This cause an increased good and service demand. One method that can be used in quality control is Six Sigma. Six Sigma is a method to improve a process and reduce defects in productions into 3.4 defects per million productions. We use handprint batik productions at PT X as a case in this study. The method is involving Define, Measure and Analyze (DMA) phases. By using Six Sigma, we can obtain the quality of printed handprint batik are quite good with 3.105 sigma and defect rate of 54.269 million production (DPMO). There are four defect causes of handprint batik namely: ripped fabric, shallowness, perforation, and mispattern which contribute 41,7%, 35,8%, 15%, 7,5% respectively from overall defects. The main cause of defects is the carelessness of workers in production process. Therefore we need to reduce the carelessness to improve production quality.

Keyword : DMAIC, FMEA, Six Sigma

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