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All Journal Jurnal Teknoin IPTEK Journal of Proceedings Series Jurnal Filsafat Proceeding International Conference on Information Technology and Business Neo-Bis Jurnal Teknobisnis International conference on Information Technology and Business (ICITB) Journal of Information Systems Engineering and Business Intelligence Religi: Jurnal Studi Agama-agama Panggung Jurnal Sistem dan Manajemen Industri Jurnal Studi Manajemen dan Bisnis Syntax Literate: Jurnal Ilmiah Indonesia Jurnal Teknik Industri: Jurnal Keilmuan dan Aplikasi Teknik Industri IJOCE (International Journal of Offshore and Coastal Engineering) Matrik : Jurnal Manajemen dan Teknik Industri Produksi International Journal of Marine Engineering Innovation and Research JISO : Journal of Industrial and Systems Optimization COMSERVA: Jurnal Penelitian dan Pengabdian Masyarakat Jurnal Teknologi dan Manajemen Industri Terapan Journal Research of Social Science, Economics, and Management Sewagati Advance Sustainable Science, Engineering and Technology (ASSET)
Nurhadi Siswanto
2Department Of Industrial And Systems Engineering Institut Teknologi Sepuluh Nopember, Surabaya
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Scheduling Program Analysis of Pressure Relief Device (PRD) According to RBI API 581 on Production Gas Separator System Dwi Priyanta; Nurhadi Siswantoro; Muhammad Saifulloh
International Journal of Marine Engineering Innovation and Research Vol. 3 No. 1 (2018)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v3i1.6066

Abstract

Pressure relief device serves to control and limit the pressure by directing the flow into an additional path. In the process of purification of oil and gas, application of PRD are found in production gas separator system. However, based on API 581, the PRD also has a risk of failure that every oil and gas company needs to conduct regular inspections to ensure the reliability of PRD. One approach to evaluating critically the PRDs for arranging and scheduling programs is to use the risk-based inspection (RBI) method. The RBI is a systematic approach to the method of inspection management of equipment or works unit based on the level of risk that the equipment or work units. Risk assessment for production gas separator system’s PRD has based on API RP 581 third edition. After knowing the level of risk for PRD, the risk needs to be evaluated. For acceptable risk, it can be used as a reference to determine the next inspection until risk target. Meanwhile, unacceptable risk should be inspected immediately after RBI analysis.
Comparative Analysis of Probability of Failure Determination Using Weibull Distribution and Generic Failure Frequencies on Heat Exchanger Tube Bundles Based on API 581 Dharma Gita Surya Prayoga; Dwi Priyanta; Nurhadi Siswantoro
International Journal of Marine Engineering Innovation and Research Vol. 2 No. 3 (2018)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v2i3.6089

Abstract

RBI analysis for heat exchanger tube has been explained by API 581. Two types of PoF determination using statistical data is provided to determine the PoF category. Both Weibull parameter and generic failure frequencies are the methods that will be analysis in this present study. PoF determination using Weibull distribution gives the exponential value of PoF in a certain of time. This method only consider failure modes and the failure rate of heat exchanger tube without considering possible active damage mechanisms in the tube. However PoF determination using generic failure frequencies gives more complex consideration. It considers not only failure and possible active damage mechanism, but also the effect of management system facilities of the heat exchanger on the integrity of the plant.
Risk Based Inspection of Gas-Cooling Heat Exchanger Dwi Priyanta; Nurhadi Siswantoro; Alfa Muhammad Megawan
International Journal of Marine Engineering Innovation and Research Vol. 1 No. 4 (2017)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v1i4.6169

Abstract

PHE – ONWJ platform personnel found 93 leaking tubes locations in the fin fan coolers/ gas-cooling heat exchanger. After analysis had been performed, the crack in the tube strongly indicate that stress corrosion cracking was occurred by chloride. Chloride stress corrosion cracking (CLSCC) is the cracking occurred by the combined influence of tensile stress and a corrosive environment. CLSCC is the one of the most common reasons why austenitic stainless steel pipework or tube and vessels deteriorate in the chemical processing, petrochemical and maritime industries. In this research purpose to determine the appropriate inspection planning for two main items (tubes and header box) in the gas cooling heat exchanger using risk based inspection (RBI) method. The result, inspection of the tubes must be performed on July 6, 2024 and for the header box inspection must be performed on July 6, 2025. In the end, RBI method can be applicated to gas-cooling heat exchanger. Because, risk on the tubes can be reduced from 4.537 m2/year to 0.453 m2/year. And inspection planning for header box can be reduced from 4.528 m2/year to 0.563 m2/year.
Optimasi Rantai Pasok Tandan Buah Segar Dan Pelepah (Limbah) Kelapa Sawit Pada Hulu Rantai Pasok Industri Kelapa Sawit Martua Philipus Patia Raja; Nurhadi Siswanto
Jurnal Teknologi dan Manajemen Industri Terapan Vol. 5 No. 1 (2026): Jurnal Teknologi dan Manajemen Industri Terapan
Publisher : Yayasan Inovasi Kemajuan Intelektual

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55826/jtmit.v5i1.1450

Abstract

Industri kelapa sawit menghadapi tantangan utama berupa tingginya production loss, biaya logistik yang besar, serta belum optimalnya pemanfaatan limbah perkebunan, khususnya pelepah kelapa sawit. Penelitian ini mengembangkan model transshipment problem berbasis Mixed Integer Linear Programming (MILP) untuk mengoptimalkan sistem transshipment multi-komoditi yang mengintegrasikan distribusi tandan buah segar (TBS) dan limbah pelepah. Model dirumuskan dengan tiga fungsi tujuan, yaitu minimasi kerugian produksi (Z1), minimasi total biaya operasional (Z2), dan maksimasi keuntungan sosial–ekonomi (Z3) yang kemudian digabung menjadi 1 fungsi tujuan utama dengan satuan ekonomi. Studi kasus dilakukan di Kalimantan Timur dengan mempertimbangkan aliran TBS dari kebun ke pengepul dan pabrik kelapa sawit (PKS), serta aliran pelepah ke fasilitas pengolahan. Hasil optimasi baseline menunjukkan solusi optimal dengan nilai Z1 sebesar Rp3,13 miliar, Z2 sebesar Rp28,15 miliar, dan Z3 sebesar Rp470,18 miliar, sehingga menghasilkan nilai objektif total sebesar Rp438,89 miliar. Hasil ini menunjukkan bahwa model mampu menekan kerugian produksi, mengendalikan biaya operasional, serta menghasilkan manfaat sosial dan ekonomi yang signifikan. Analisis sensitivitas mengonfirmasi bahwa faktor cuaca dan kapasitas pengolahan pelepah merupakan parameter paling berpengaruh terhadap kinerja sistem, menegaskan pentingnya perencanaan kapasitas dan mitigasi risiko dalam mendukung keberlanjutan rantai pasok kelapa sawit.
Prediction of Ground Vibration due to Blasting Activities of Coal Open Pit Mine Near Village Residents Using Multivariate Logarithmic Regression Alloysius Vendhi Prasmoro; Nurhadi Siswanto; Budi Santosa; Giri Waluyo Nugraha; Mohd Shukor Salleh
Advance Sustainable Science Engineering and Technology Vol. 8 No. 3 (2026): May - July
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v8i3.3616

Abstract

Blasting activities are among the most important in mining and can have a negative impact on the environment and surrounding communities, causing disruption and even damaging nearby buildings and infrastructure. If the community protests and demonstrates, mining operations may be shut down, which would be very detrimental to the company. Studies are needed on effective planning to reduce the negative impacts. Ground vibrations measured by Peak Particle Velocity (PPV) are subject to thresholds set by each region's standards; in this research area, the maximum threshold is 3 mm/s to avoid damage to nearby buildings or settlements. The important variables are the explosive charge per delay and the distance, along with other blasting geometry variables such as spacing, burden, stemming, powder factor, and number of blast holes. Several previous researchers have used methods to predict PPV, with detonation parameters as the independent variables. This research uses general empirical methods and multivariate logarithmic regression (MLR). Prediction using MLR is better than general empirical methods; with R2 = 0.925, RMSE = 0.247, MAE = 0.548, MAPE = 0.218, and VAF = 96.66%, indicating near-perfect prediction. The MLR model produces a reference maximum explosive charge per delay of 59.09 kg.
Optimization for Main Distribution Materials of Low-Voltage Switching Devices (MDU PHBTR) Allocation for Transportation Cost Efficiency in PT PLN (Persero) using Goal Programming Kusnadi Agus Nugroho; Nurhadi Siswanto
Journal Research of Social Science, Economics, and Management Vol. 5 No. 7 (2026): 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.v5i7.1340

Abstract

Logistics costs for Main Distribution Material (MDU) of Low Voltage Switchgear Devices (PHBTR) increased from IDR 12.5 billion in 2023 to IDR 13.9 billion in 2024, alongside persistent delivery delays beyond the Service Level Agreement (SLA) standards (30 days for Sumatera and Jamali; 45 days for Kalimantan and Sulmapana). In 2023, 172 Detailed Contracts (8.35%) experienced delays, affecting 2,223 units (12.18%), while in 2024, 149 contracts (6.34%) were delayed, impacting 1,448 units (7.17%). The key challenge is developing a distribution allocation model that considers supplier cost differences and Unit Induk demand to improve transportation efficiency and reduce delays. This study applies a quantitative approach using internal secondary data from PT PLN Quarter III 2025, involving 17 suppliers and 22 Unit Induk. The Weighted Goal Programming method is employed to address multi-objective trade-offs between minimizing transportation costs and fulfilling regional demand. Modeling using LINGO software produced an optimal transportation cost of IDR 2,129,998,480 with zero deviation, indicating full demand satisfaction. Compared to the initial allocation cost of IDR 2,704,828,480, the optimized model generated savings of IDR 574,830,000 (approximately 21.25%), particularly for the PL-250-2-LBS, PL-400-2-LBS, and PL-400-4-LBS variants. The proposed model offers a practical decision-making framework to control logistics costs and enhance service reliability..
Preliminary Study of an Integrated Calculation of Ship Strength on Tankers with Applicable Regulations Ardi Nugroho Yulianto; Erzad Iskandar Putra; Yuda Apri Hermawan; Teguh Putranto; Gita Marina Ahadyanti; Septia Hardy Sujiatanti; Danu Utama; Nurhadi Siswantoro; Irfan Zidni; Herry Sufyan Hadi
International Journal of Offshore and Coastal Engineering Vol. 7 No. 1 (2023)
Publisher : Department of Ocean Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25800914.v7i1.15529

Abstract

Recently, the development of the digital era has increased significantly. Industry 4.0 began to be discussed and applied in the early 21st century. Cyber-Physical systems are becoming a trend in current technological developments. Several technologies in Industry 4.0 are being applied, such as the internet of things, cloud computing, automated simulation, intelligent robots, big data analysis, augmented reality, and additive manufacturing. The shipyard industry is one industry that must be able to adapt to keep up with technological developments. In the ship's preliminary design stage, the strength calculation process that refers to certain regulations has an important role in the design process. The integrated calculation system will make working easier for a naval architect. This paper aims to conduct an initial study in calculating ship strength integrated in real-time with the regulations that govern it. This study produces an idea to integrate the calculation of ship strength with regulations from a class society that continues to grow. The research is expected to provide further development to assist in the preliminary design process that provides efficiency and more accurate monitoring of results.
Model Mixed-Integer Linear Programming Dalam Perencanaan Produksi Di Perusahaan Manufaktur Kosmetik Untuk Meminimalkan Biaya Yosafat Yudhisamita; Nurhadi Siswanto
Jurnal Teknologi dan Manajemen Industri Terapan Vol. 5 No. 3 (2026): Jurnal Teknologi dan Manajemen Industri Terapan
Publisher : Yayasan Inovasi Kemajuan Intelektual

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55826/jtmit.v5i3.2095

Abstract

Perusahaan manufaktur kosmetik menghadapi tantangan dalam menyusun perencanaan produksi yang mampu memenuhi permintaan pelanggan dengan biaya yang efisien. Penelitian ini bertujuan mengembangkan model Mixed Integer Linear Programming (MILP) untuk mengoptimalkan perencanaan produksi dengan meminimalkan total biaya yang meliputi biaya produksi, biaya raw material, biaya packaging material, biaya persediaan produk jadi, biaya setup mesin mixing, biaya setup mesin filling, dan biaya tenaga kerja. Model dikembangkan berdasarkan karakteristik proses produksi kosmetik yang terdiri atas proses mixing, filling, dan packing, dengan mempertimbangkan berbagai kendala operasional seperti kapasitas mesin, waktu produksi, eligibility filling line, serta ketersediaan packaging material. Penyelesaian model dilakukan menggunakan perangkat lunak LINGO. Hasil penelitian menunjukkan bahwa model yang dikembangkan mampu menghasilkan rencana produksi yang lebih efisien dibandingkan metode perusahaan. Total biaya produksi berhasil diturunkan dari Rp12,12 miliar menjadi Rp7,88 miliar, sehingga diperoleh penghematan sebesar Rp4,24 miliar atau 34,9%. Analisis sensitivitas menunjukkan bahwa biaya raw material merupakan parameter yang paling berpengaruh terhadap perubahan nilai fungsi tujuan. Hasil penelitian ini menunjukkan bahwa pendekatan MILP dapat digunakan sebagai alat pendukung pengambilan keputusan dalam perencanaan produksi pada industri manufaktur kosmetik untuk meningkatkan efisiensi biaya dan pemanfaatan sumber daya.
ANALISIS BOTTLENECK DAN PENINGKATAN KINERJA LINI PRODUKSI PADA INDUSTRI MAKANAN DENGAN PENDEKATAN SIMULASI Ahmed Raecky Baihaqy; Hamdan Muhammadi; Nurhadi Siswanto
JISO : Journal of Industrial and Systems Optimization Vol. 8 No. 1 (2025): Juni 2025
Publisher : Universitas Maarif Hasyim Latif

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51804/jiso.v8i1.1-9

Abstract

ABSTRAK Sebuah lini produksi dirancang untuk memastikan bahwa aktivitas produksi berlangsung lancar dengan output maksimal. Namun, kelancaran lini produksi dapat terganggu jika terjadi bottleneck dalam aktivitas atau proses tertentu, yang dapat menurunkan tingkat produksi secara signifikan. Penelitian ini bertujuan untuk mengidentifikasi dan menganalisis bottleneck dalam lini produksi industri makanan menggunakan pendekatan simulasi. Hasil simulasi kondisi eksisting menunjukkan bahwa proses packing menjadi bottleneck utama. Melalui skenario perbaikan berupa kombinasi penugasan mesin manual packing yang lebih fleksibel dan penambahan konveyor, simulasi membuktikan bahwa throughput produksi per jam dapat meningkat sebesar 8,6%. ABSTRACT A production line is designed to ensure that production activities run smoothly and achieve maximum output. However, its smooth operation can be disrupted if a bottleneck occurs in certain activities or processes, significantly reducing the production rate. This research aims to identify and analyze bottlenecks within a food industry production line using a simulation-based approach. The simulation results of the existing conditions indicate that the packing process is the primary bottleneck. Through an improvement scenario involving a combination of more flexible manual packing machine assignments and the addition of conveyors, the simulation demonstrated that hourly production throughput could increase by 8.6%.  
OPTIMASI DISTRIBUSI BAHAN BAKAR MINYAK (BBM) BERBASIS KAPAL UNTUK MENDUKUNG KEANDALAN ENERGI DI PULAU BALI MENGGUNAKAN INVENTORY ROUTING PROBLEM Galih Irvandi; Nurhadi Siswanto
JISO : Journal of Industrial and Systems Optimization Vol. 9 No. 1 (2026): Juni 2026
Publisher : Universitas Maarif Hasyim Latif

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51804/jiso.v9i1.140-148

Abstract

Abstrak Sistem kelistrikan Bali menghadapi tekanan struktural yang saling memperparah: beban puncak tumbuh 7% per tahun menuju 1.854 MW pada 2030 dengan cadangan daya hanya 17,3% (PLN, 2025) yang jauh di bawah standar minimal PLN sebesar 34%, serta ketergantungan penuh pada Saluran Kabel Laut Tegangan Tinggi (SKLT) berkapasitas 270 MW sebagai satu-satunya interkoneksi dari Jawa. Distribusi Bahan Bakar Minyak (BBM) jenis High Speed Diesel (HSD) dan Marine Fuel Oil (MFO) menghadapi triple constraint yang saling mengunci: fasilitas penerima di pembangkit hanya mampu menerima kapal berkapasitas 2.000–4.000 KL sehingga membutuhkan frekuensi pengiriman tinggi, namun kapasitas jetty enam depot Terminal Bahan Bakar Minyak (TBBM) telah beroperasi pada Berth Occupancy Rate (BOR) 0,86–0,95 yang melampaui ambang kritis 80% (UNCTAD, 2022) sehingga penambahan frekuensi pengiriman tidak dimungkinkan tanpa perluasan infrastruktur. Kondisi ini menyebabkan Hari Operasi Pembangkit (HOP) konsisten berada pada titik minimum 7 hari, sangat rentan terhadap keterlambatan kapal maupun lonjakan kebutuhan akibat gangguan SKLT. Penelitian ini memformulasikan permasalahan distribusi BBM sebagai Maritime Inventory Routing Problem (MIRP) yang mengintegrasikan secara simultan keputusan routing kapal dari enam depot TBBM ke tiga pembangkit dan manajemen inventori BBM. Model diformulasikan sebagai Mixed Integer Linear Programming (MILP) dan diselesaikan menggunakan solver CBC melalui antarmuka Python PuLP pada horizon perencanaan 60 bulan (Januari 2026–Desember 2030). Hasil optimasi menghasilkan total biaya distribusi BBM sebesar Rp 5.423.893 juta dengan utilisasi armada K004 mencapai 100% dan tidak diperlukan investasi tangki tambahan. Analisis sensitivitas mengkonfirmasi kapasitas jetty sebagai binding constraint paling kritis: kenaikan permintaan 10% membutuhkan 46 trip charter darurat (+12% biaya), sementara penambahan hanya 3 slot jetty menghemat Rp 467,47 miliar (?7,61%) dan mengurangi ketergantungan charter. ABSTRACT Bali's power system faces structurally reinforcing pressures: peak load growing at 7% per year toward 1,854 MW by 2030 with a reserve margin of only 17.3% (PLN, 2025) well below PLN's 34% minimum and sole dependence on a 270 MW High VoltageSubmarine Cable (SKLT) from Java. The fuel oil (BBM) distribution system faces a self-reinforcing triple constraint: receiving facilities at power plants accommodate only 2,000–4,000 KL vessels necessitating high delivery frequencies, yet the six Fuel Terminal (TBBM) depots operate at Berth Occupancy Rates (BOR) of 0.86–0.95 exceeding the UNCTAD critical threshold of 80% (UNCTAD, 2022) making frequency increases impossible without infrastructure expansion. This causes Plant Operating Days (HOP) to consistently reach its minimum of 7 days, leaving the system highly vulnerable to vessel delays and SKLT disruptions. This study formulates the ship-based BBM distribution problem as a Maritime Inventory Routing Problem (MIRP) an optimization model simultaneously integrating vessel routing from six TBBM depots to three power plants and BBM inventory management. The model is formulated as Mixed Integer Linear Programming (MILP) and solved using the CBC solver via Python PuLP over a 60-month horizon (January 2026–December 2030). Optimization yields a total BBM distribution cost of IDR 5,423,893 million with K004 fleet utilization reaching 100% and no additional tank investment required. Sensitivity analysis confirms jetty capacity as the most critical binding constraint: a 10% demand increase requires 46 charter trips (+12% cost), while adding only 3 jetty slots saves IDR 467.47 billion (?7.61%) and reduces charter dependency.
Co-Authors -, Elisabeth Adhi Iswantoro Adianto, Asyraf Nur Afanda Dwi Ragil Risnavian Agoes Santoso Aguk Zuhdi Muchamad Fathallah Ahmad Rusdiansyah Ahmed Raecky Baihaqy Alfa Muhammad Megawan Ali Reza, Muhammad Alloysius Vendhi Prasmoro Andi Irma Arianty Ardi Nugroho Yulianto Aris Setya Yuwana Asyraf Nur Adianto Asyraf Nur Adianto Atikah Aghdhi Pratiwi Aydin Dogan Aydin Doğan Bachtiar Rosihan Aghda Baihaqy, Ahmed Raecky Budi Santosa Cahyono, Beny Danim Musthofa Danu Utama Defriko Christian Dewandhika Dewi Sartika Dewi Sartika Dharma Gita Surya Prayoga Dimas Fajar Prasetyo Effi Latiffianti Eko Nurmianto Elisabeth - Erwin Widodo Erwin Widodo Erzad Iskandar Putra Fakher Shwan Rafeek Faris Zulfar Rosyadi Faris Zulfar Rosyadi Fathallah, Aguk Zuhdi Muhammad Galih Irvandi Giri Waluyo Nugraha Gita Marina Ahadyanti Hafidz Ridho Hamdan Muhammadi Hari Prastowo Hasan Aji Prawira Hasan Aji Prawira Herawatie, Dyah Herry Sufyan Hadi Imam Trio Utama Irfan Zidni Iwan Febrianto Jamal Ramadhan Jamal Ramadhan Khoirunnisa Mahdiyah Syawalina Khoirunnisa Mahdiyah Syawalina Kusnadi Agus Nugroho M. Badrus Zaman Madina Nur Pratiwi Madina Nur Pratiwi Mar'atus Sholihah Martua Philipus Patia Raja Maulin Masyito Putri Mohd Shukor Salleh Muhammad Ali Reza Muhammad Badrus Zaman Muhammad Badrus Zaman Muhammad Naufal Bintang Muhammad Naufal Bintang Muhammad Saifulloh Muhammad Saifulloh Muhammadi, Hamdan Musthofa, Danim Nabila Yuraisyah Salsabila Nabila Yuraisyah Salsabila Nugroho, Dwi Oktavianto Wahyu Oryza Akbar Rochmadhan Oryza Akbar Rochmadhan Prasetyo, Dimas Fajar Prawira, Hasan Aji Prayoga, Dharma Gita Surya Priambodo, Bangkit Nadyo Priyanta, Dwi Priyanta, Dwi Retno Widyaningrum Reza Tianto Ridho, Alvin Ichwannur Rizky Agung Sukandar Rochmadhan, Oryza Akbar Salsabila, Nabila Yuraisyah Semin Semin Semin Semin Semin Semin Semin Semin Septia Hardy Sujiatanti Septian Cahya Shaneza Fatma Rahmadhanty Shaneza Fatma Rahmadhanty Stefanus Eko Wiratno Sukriyah Kustanti Moerad Sukriyah Kustanti Moerad Teguh Putranto Trika Pitana Widodo , Erwin Wolfgang Busse Wolfgang Busse Yani Dhina Mirenani Yani Dhina Mirenani Yosafat Yudhisamita Yuda Apri Hermawan Zaman, Muhammad Badrus Zya Labiba Zya Labiba