ERMAWATI, ELI (2026) PENERAPAN METODE DMAIC PADA KESELAMATAN DAN KESEHATAN KERJA (K3) PEMBUATAN TANGKI, INSTLASI DAN PEMBANGUNAN RUMAH TANGKI SOLAR (GASOLINE) DI PT. NATURAL INDOCOCONUT ORGANIK - HALMAHERA UTARA. S1 thesis, Universitas Mercu Buana Jakarta.
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Abstract
Occupational Safety and Health (K3) is a crucial aspect in mitigating work accidents and Occupational Diseases (PAK) in the manufacturing sector. PT Adi Jaya Tehnik, as an OHS Service Company (PJK3) in the field of Steam Engines, Pressure Vessels, and Storage Tanks (PUBT), conducts OHS norm supervision through inspection and testing (inspection and testing) to ensure the operational feasibility of the equipment. This report aims to evaluate the minimum vessel wall thickness threshold according to the ASME Section VIII Div. 1 (2019) standard and Permenaker No. 37 of 2016. The analysis methodology uses Microsoft Excel and Minitab 19 software for statistical data processing. The analysis results show that the actual minimum shell thickness is 3.85 mm, the actual minimum head thickness is 3.80 mm, and the weld strength is 370 MPa. Based on mechanical calculations and functional tests of safety devices on units No. Series 2609, 2610, and 2611, the tank construction is declared to meet safety requirements. It was concluded that the unit was feasible to operate sustainably in compliance with the Standard Operating Procedure (SOP) and applicable K3 regulations. Based on the results of data processing, the level of process capability experienced a drastic increase, where the Sigma value before the use of DMAIC was 4.77 increasing to 5.45 after the implementation of DMAIC and DoE. This increase indicates a decrease in the failure rate or deviation in the inspection and test process, thus providing a higher safety guarantee for the operation of the tank. Keywords: Fuel Tankl, OHS (K3), DoE, DMAIC, ASME Section VIII, Minitab 19, Technical Inspection, Fabrication Keselamatan dan Kesehatan Kerja (K3) merupakan aspek krusial dalam mitigasi kecelakaan kerja dan Penyakit Akibat Kerja (PAK) pada sektor manufaktur. PT Adi Jaya Tehnik, sebagai Perusahaan Jasa K3 (PJK3) bidang Pesawat Uap, Bejana Tekanan, dan Tangki Timbun (PUBT), melakukan pengawasan norma K3 melalui pemeriksaan dan pengujian (riksa uji) guna memastikan kelayakan operasional alat. Laporan ini bertujuan mengevaluasi ambang batas ketebalan minimum dinding bejana sesuai standar ASME Section VIII Div. 1 (2019) dan Permenaker No. 37 Tahun 2016. Metodologi analisis menggunakan perangkat lunak Microsoft Excel dan Minitab 19 untuk pengolahan data statistik. Hasil analisis menunjukkan tebal aktual minimum shell sebesar 3,85 mm, tebal aktual minimum head sebesar 3,80 mm, serta kekuatan las sebesar 370 MPa. Berdasarkan perhitungan mekanis dan uji fungsi alat pengaman (safety device) pada unit No. Seri 2609, 2610, dan 2611, konstruksi tangki dinyatakan memenuhi persyaratan keselamatan. Disimpulkan bahwa unit tersebut layak beroperasi secara berkelanjutan dengan kepatuhan terhadap Standard Operating Procedure (SOP) dan regulasi K3 yang berlaku. Berdasarkan hasil pengolahan data, tingkat kapabilitas proses mengalami peningkatan yang drastis, di mana nilai Sigma sebelum penggunaan DMAIC sebesar 4,77 meningkat menjadi 5,45 setelah implementasi DMAIC dan DoE. Kenaikan ini menunjukkan penurunan tingkat kegagalan atau deviasi pada proses riksa uji, sehingga memberikan jaminan keamanan yang lebih tinggi terhadap operasional tangki tersebut. Kata Kunci : Tangki Gasoline, K3, DoE, DMAIC, ASME Section VIII, Minitab 19, Riksa Uji, Fabrikasi.
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