USULAN STRATEGI UNTUK MENINGKATKAN KUALITAS PRODUKSI PIPA ELECTRICAL RESISTANCE WELDED (ERW) MENGGUNAKAN METODE SIX SIGMA (Studi Kasus pada PT Krakatau Pipe Industries)

EKASENA, JOSE GLENDEA (2025) USULAN STRATEGI UNTUK MENINGKATKAN KUALITAS PRODUKSI PIPA ELECTRICAL RESISTANCE WELDED (ERW) MENGGUNAKAN METODE SIX SIGMA (Studi Kasus pada PT Krakatau Pipe Industries). Skripsi thesis, UPN Veteran Yogyakarta.

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Abstract

ABSTRAK
Industri manufaktur di Indonesia terus menghadapi tantangan dalam menjaga
kualitas produk, terutama di tengah persaingan global yang semakin ketat. PT
Krakatau Pipe Industries, sebagai salah satu produsen utama pipa baja, mengalami
permasalahan tingginya tingkat cacat pada produk pipa Electrical Resistance
Welded (ERW), yakni sebesar 5,189% sepanjang tahun 2023. Angka ini melampaui
batas toleransi perusahaan yang ditetapkan sebesar 4%. Jenis cacat yang paling
sering ditemukan antara lain high/low, IT scarfing, overlapp thickness, dan roll
mark scratch, yang mempengaruhi mutu produk dan menurunkan efisiensi
operasional.
Penelitian ini bertujuan untuk mengidentifikasi penyebab utama terjadinya
cacat pada produk pipa ERW dan menyusun strategi perbaikan dengan pendekatan
Six Sigma. Metode DMAI (Define, Measure, Analyze, Improve) digunakan dalam
menganalisis proses produksi, menghitung tingkat kecacatan melalui nilai Defect
Per Million Opportunities (DPMO) dan Level Sigma, serta merumuskan solusi
berbasis prioritas risiko menggunakan metode Failure Mode and Effect Analysis
(FMEA). Data yang dianalisis berasal dari hasil produksi selama periode Januari
hingga Desember 2023. Berdasarkan hasil pengolahan, diketahui bahwa rata-rata
nilai DPMO mencapai 28.331,068 dengan level sigma sebesar 3,5. Sementara itu,
FMEA digunakan untuk menentukan nilai Risk Priority Number (RPN) dan
mengidentifikasi prioritas perbaikan.
Strategi perbaikan yang diusulkan meliputi peningkatan kompetensi operator
melalui pelatihan, kalibrasi mesin secara rutin, serta penggantian komponen yang
telah melewati masa pakainya. Hasil penelitian ini diharapkan mampu
meningkatkan kualitas proses produksi secara konsisten dan berkelanjutan.
Kata kunci:
Six Sigma, DMAI, FMEA, Pengendalian Kualitas, PT Krakatau
Pipe Industries
xiii
Proposed strategy to improve the quality of Electrical Resistance Welded
pipe production using six sigma method
ABSTRACT
The manufacturing industry in Indonesia faces great challenges in maintaining
product quality amid increasingly fierce competition. PT Krakatau Pipe Industries
as one of the main producers of steel pipes in Indonesia experienced the problem of
high defect rates in Electrical Resistance Welded (ERW) pipe products, with the
percentage of defects reaching 5.189% during the January-December 2023 period,
exceeding the company's threshold of 4%. The main defects found include high/low,
IT scarfing, overlapp thickness, and roll mark scratch, which not only reduce
product quality but also increase production costs due to rework and potentially
disrupt the company's operational efficiency.
This study aims to identify the main causal factors of defects in ERW pipes and
apply the Six Sigma method as a systematic approach to reduce defect rates. The
Six Sigma method is used through the stages of Define, Measure, Analyze, Improve.
(DMAI) stages to analyze the production process, identify critical points causing
defects, and design and implement improvement solutions. Data was collected
quantitatively from production results and quality inspections and supported by
qualitative analysis through field observations and interviews with production
operators.
The findings of this study prove that the implementation of the Six Sigma
method can effectively reduce the number of defective products and improve the
efficiency of the production process at PT Krakatau Pi.
Keyword:
Six Sigma, DMAI, FMEA, Quality Control, PT Krakatau Pipe
Industries
xiv

Item Type: Tugas Akhir (Skripsi)
Uncontrolled Keywords: Six Sigma, DMAI, FMEA, Quality Control, PT Krakatau Pipe Industries
Subjek: H Social Sciences > HB Economic Theory
Divisions: Fakultas Teknik Industri > (S1) Teknik Industri
Depositing User: Eko Yuli
Date Deposited: 04 Nov 2025 01:38
Last Modified: 04 Nov 2025 01:38
URI: http://eprints.upnyk.ac.id/id/eprint/45286

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