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All Journal G-Tech : Jurnal Teknologi Terapan Journal Research of Social Science, Economics, and Management
Suparno Suparno
Institut Teknologi Sepuluh Nopember, Indonesia
Computer Science & IT Decision Sciences, Operations Research & Management Energy Engineering Environmental Science

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Asesmen Risiko Gangguan Saluran Kabel Tegangan Menengah 20 kV Menggunakan Metode Bow Tie pada PT X Syaiful Azhari Siregar; Suparno Suparno
G-Tech: Jurnal Teknologi Terapan Vol 8 No 3 (2024): G-Tech, Vol. 8 No. 3 Juli 2024
Publisher : Universitas Islam Raden Rahmat, Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33379/gtech.v8i3.4420

Abstract

Sebagai salah satu Unit Pelaksana pada PT PLN (Persero) yang beroperasi pada proses bisnis distribusi dan pelayanan pelanggan, keandalan jaringan distribusi menjadi salah satu hal yang harus diperhatikan oleh PT X. Pada penelitian ini, dilakukan 3 tahapan asesmen terhadap risiko gangguan Saluran Kabel Tegangan Menengah (SKTM) 20 kV pada PT X. Pada tahap pertama sebuah diagram bow tie yang terdiri dari 10 penyebab dan 4 dampak risiko, serta 18 aktivitas pengendalian risiko dibentuk. Pada tahap kedua, dilakukan penentuan tingkat risiko terjadinya gangguan SKTM, yang diawali dengan penentuan tingkat kemungkinan, tingkat dampak, dan pengukuran efektivitas pengendalian risiko. Hasil perhitungan selanjutnya dipetakan ke dalam matriks risiko, yang menunjukkan bahwa risiko gangguan SKTM berada pada kategori “Tinggi”. Pada tahap terakhir, dilakukan perankingan efektivitas pengendalian risiko yang ada untuk menentukan prioritas aktivitas pengendalian yang perlu ditindaklanjuti. Terdapat 7 aktivitas yang harus segera ditindaklanjuti karena implementasinya belum efektif.
Selection Of Coal Terminal Port Spare Parts Suppliers Using The AHP-Topsis Method Rizky Ramadhani; Suparno Suparno
Journal Research of Social Science, Economics, and Management Vol. 4 No. 11 (2025): Journal Research of Social Science, Economics, and Management
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jrssem.v4i11.864

Abstract

In the coal mining industry, the conveyor system is a vital component in ensuring the smooth distribution of coal from the stockpile to barges at the terminal port. PT X, one of the leading coal mining companies in Indonesia, faces challenges regarding the sustainability of conveyor operations, particularly in spare part procurement. Dependence on specific suppliers without continuous evaluation can pose risks such as delivery delays, price fluctuations, and operational downtime, which affect the company’s productivity. This study aims to develop a supplier selection model for spare parts at the Coal Terminal Port of PT X using the Analytical Hierarchy Process (AHP) and Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) methods. AHP is employed to determine the priority weights of criteria based on expert assessments through pairwise comparisons, while TOPSIS is used to rank suppliers based on their relative closeness to the ideal solution. The AHP results indicate that the highest weighted criteria are Quality (35,59%), Services (29.59%), Delivery (15,93%), Cost (12,98%), and Profile (5,91%), while the top sub-criteria are Specification (19,30%), Certification (16,28%), followed by After-Sales Service (15,63%) and Warranty (13,97%) with a consistency ratio < 0,1. Supplier S1 ranks the highest with a preference value of 0,8837. Furthermore, to ensure the robustness of the TOPSIS ranking results, a sensitivity analysis was conducted by increasing or decreasing weights by 1%, and the top-ranked supplier remained unchanged. Thus, the TOPSIS method in this study is proven to be robust.
Co-Authors Rizky Ramadhani Syaiful Azhari Siregar