Peningkatan Kualitas Hasil Produksi Tangki Transformator Tenaga Menggunakan Pendekatan Six Sigma Di Fabrikasi Tangki

Darwis, Nur Aswan (2021) Peningkatan Kualitas Hasil Produksi Tangki Transformator Tenaga Menggunakan Pendekatan Six Sigma Di Fabrikasi Tangki. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Transformator merupakan bagian penting dalam keandalan sistem tenaga listrik di Indonesia. Kegagalan kerja pada transformator menyebabkan kegagalan sistem jaringan karena adanya permasalahan terhadap kualitas dari tangki transformator itu sendiri. Berdasarkan data dari salah satu pelanggan dari Fabrikasi Tangki, yaitu Fabrikasi Transformator, adanya ketidaksesuaian kualitas tangki masih terjadi dan belum ada perbaikan yang serius untuk menyelesaiakan masalah tersebut. Kualitas tangki yang kurang baik, dapat menyebabkan terjadinya kebocoran dan munculnya karat sehingga akan mempengaruhi kualitas transformator secara keseluruhan. Cacat hasil inspeksi internal juga masih sangat banyak sehingga perlu adanya perbaikan proses. Permasalahan yang sering terjadi harus dianalisis lebih dalam. Ketidakkonsistenan terhadap kualitas, mengharuskan perlunya suatu metode perbaikan yang efektif dan efisien. Metode pendekatan Six Sigma merupakan salah satu metode perbaikan yang sistematis untuk mengurai masalah dan menyelesaikannya sesuai dengan skala prioritas. Level sigma Fabrikasi Tangki berdasarkan data keluhan pelanggan hanya sebesar 2.76. Berdasarkan data keluhan dari Fabrikasi Transformator, masalah yang paling dominan berasal dari proses welding dan painting yaitu 77.1%, di mana cacat under spec painting thickness paling dominan, disusul dengan cacat pengelasan berupa incomplete fusion, porosity dan spatter. Potensi masalah yang muncul dianalisis menggunakan metode FMEA untuk menentukan prioritas penyelesaian masalah. Target pengiriman, parameter pengelasan, cara pengecekan, cara kerja, material kurang sesuai, standar kesesuaian, mesin kerja, SDM kurang memadai dan suasana lingkungan kerja merupakan prioritas potensi masalah yang harus diselesaikan. Perbaikan prosedur, standar kesesuaian dan konsistensi pelaksanaan umumnya menjadi usulan perbaikan untuk mengurangi cacat hasil produksi yang dikeluhkan oleh pelanggan. ======================================================================================================= A transformer is an integral part of the reliability of the electric power system in Indonesia. Loss of work on the transformer can cause Power system failures due to problems with the quality of the transformer tank itself. Based on data from one of the Tank Fabrication customers, namely Transformer Fabrication, there are still tank quality discrepancies, and there has been no severe repair to resolve the problem. Bad quality of the tank cause leakage and the appearance of rust, so that it will affect the quality of the transformer as a whole. There are still many defects in the results of internal inspections, so process improvements are needed. Problems that occurred should be analyzed more deeply. Inconsistency in a quality necessitates the need for an effective and efficient improvement method. According to a priority scale, the Six Sigma approach method is a systematic improvement method to parse problems and solve them. Tank Fabrication sigma level based on customer complaint data is only 2.76. Based on complaint data from Transformer Fabrication, the most dominant problem comes from the welding and painting process, namely 77.1%, where under spec painting thickness defects are the most prevalent, followed by welding defects in the form of incomplete fusion, porosity, and spatter. Potential problems that arise are analyzed using the FMEA method to determine the priority of problem-solving. Delivery targets, welding parameters, checking methods, working methods, inappropriate materials, conformity standards, work machines, inadequate human resources, and working environment are potential priority problems that must resolve. Improvements to reduce production defects complained by customers are generally propose improvements to procedures, standards of conformity, and consistency of implementation.

Item Type: Thesis (Masters)
Uncontrolled Keywords: Tank, Transformer, FMEA, Six Sigma Tangki, Tansformator, FMEA, Six Sigma
Subjects: T Technology > TS Manufactures
T Technology > TS Manufactures > TS156 Quality Control. QFD. Taguchi methods (Quality control)
Divisions: Faculty of Creative Design and Digital Business (CREABIZ) > Technology Management > 61101-(S2) Master Thesis
Depositing User: Nur Aswan Darwis
Date Deposited: 31 Jul 2021 12:42
Last Modified: 31 Jul 2021 12:42
URI: https://repository.its.ac.id/id/eprint/84613

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