Quality Improvement on Speaker Net Products using Six Sigma Method with DMAIC (Case Study at Pt.D)


Authors : Dennis Sutjipto; Rina Fitriana; Indah Permata Sari

Volume/Issue : Volume 7 - 2022, Issue 8 - August

Google Scholar : https://bit.ly/3IIfn9N

Scribd : https://bit.ly/3xrcZBg

DOI : https://doi.org/10.5281/zenodo.7080417

This research has the main objective to improve the quality of the speaker net products at PT. D. This study uses the six sigma method with DMAIC (Define, Measure, Analyze , Improve, Control) stages and tools such as FMEA (Failure Mode and Effects Analysis),and FTA (Fault Tree Analysis)tables. DMAIC consists of define, measure, analyze, improve, and control. In the early stages of the study, the define stage was used to identify existing defects using CTQ (Critical to Quality) identification and the SIPOC (Supplier, Input, Process, Ouput, Customer) table. This study uses p and c control charts at the measure stage to get a sigma level value of 3.57. In the analyze stage, the FMEA table is used to obtain the two problems that have the most impact, namely operator problems on scratch and dented defects. At the improve stage, improvements are proposed in the improve stage using the 5W1H table tools, where the results of the table are problems that occur such as ineffective operators. work and more. The proposed implementation is making SOPs and maintenance sheets for each machine. The results of this study obtained a sigma level value after implementing 3.67 at the control stage. The result of the sigma level value which has increased by 0.1 means that the results of the implementation used in the company have experienced an effect even though the effect is very small but has an impact on improving the quality of the product produced.

Keywords : Quality Control, Six Sigma, DMAIC (Define, Measure, Analyze , Improve, Control), FTA (Fault Tree Analysis), FMEA (Failure Mode and Effects Analysis), Speaker net

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