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All Journal Syntax Literate: Jurnal Ilmiah Indonesia Sebatik
Qonitah, Iftinaniffah
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Humanities Computer Science & IT Education Environmental Science Law, Crime, Criminology & Criminal Justice Social Sciences Other

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Investment Feasibility Analysis of Rooftop Solar Power Plant for Spare Parts Supply Company Wisudanto, Wisudanto; Qonitah, Iftinaniffah; Utomo, Wahyu
Sebatik Vol. 28 No. 2 (2024): December 2024
Publisher : STMIK Widya Cipta Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46984/sebatik.v28i2.2386

Abstract

A sustainable economic approach involves achieving economic growth while preserving the environment. One solution aligned with green economy initiatives is the Solar Power Plant (PLTS), which utilizes sunlight as the primary energy source to generate electricity. In response to increasing energy demand and growing environmental concerns, a spare parts supply company in Karawang, West Java, has decided to adopt hybrid energy by investing in renewable energy sources through the installation of an on-grid Solar Power Plant (PLTS) on the factory roof. This study aims to evaluate the financial feasibility of this green economic initiative. The analysis considers various aspects, including initial investment costs, operational and maintenance expenses for key components (solar modules and inverters), potential savings in electricity costs, and the projected return on investment over a specific period. The financial analysis methods applied include Net Present Value (NPV), Internal Rate of Return (IRR), Payback Period (DPP), and Profitability Index (PI) to determine the project's economic viability. The findings indicate that the DPP is 2.43 years (well below the 25-year lifespan), NPV is Rp 1,433,144,387.92 (positive and greater than 1), IRR is 46.31% (exceeding the 5.75% benchmark), and PI is 1.95 (greater than 1). Based on these results, it can be concluded that the construction of a rooftop solar power plant with an on-grid system is a financially viable investment for the spare parts supply company in Karawang, West Java.
Optimasi Penjadwalan Untuk Mengurangi Risiko Keterlambatan Proyek Pada Fase Detailed Engineering Design di Konsultan Teknik Bidang Minyak Bumi dan Gas Qonitah, Iftinaniffah; Mohammad Rosyid, Daniel
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : Syntax Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36418/syntax-literate.v11i2.63751

Abstract

Keterlambatan pada fase Detailed Engineering Design (DED) merupakan salah satu permasalahan kritis dalam proyek minyak dan gas karena berdampak langsung pada keterlambatan atau kesalahan pengadaan dan konstruksi. Data dari periode 2023–2025 pada Engineering Consultant X, yang bertindak sebagai subkonsultan dalam tiga proyek DED bangunan lepas pantai, menunjukkan perlunya rebaseline jadwal akibat keterlambatan. Kondisi tersebut dipicu oleh ketidakseimbangan beban kerja antar departemen, seperti yang terlihat pada variasi jumlah dokumen yang ditangani per personel, dari 3 hingga 14 dokumen, sehingga meningkatkan risiko keterlambatan proyek dan potensi denda. Berdasarkan permasalahan tersebut, penelitian ini bertujuan untuk mengoptimalkan penjadwalan proyek DED guna meminimalisir risiko keterlambatan tanpa menimbulkan kerugian finansial bagi perusahaan. Metode yang digunakan meliputi pemodelan jaringan kerja menggunakan PERT (Program Evaluation and Review Technique) berdasarkan data aktual dari tiga proyek sebelumnya, CPM (Critical Path Method), serta analisis risiko keterlambatan melalui simulasi Monte Carlo, dengan mempertimbangkan keterbatasan sumber daya perusahaan dan mendorong redistribusi beban kerja yang lebih seimbang. Hasil penelitian menunjukkan bahwa durasi proyek optimal yang diperoleh adalah 336 hari kalender atau 241 hari kerja dengan total kebutuhan 208 personel. Aktivitas yang paling kritis terhadap durasi proyek adalah Technical Bid Evaluation for Jacket Main Structure, Project Engineering Close Out Report, dan Material Take Off for Substructures Appurtenances – Client Review. Implikasi dari penelitian ini adalah tersedianya model penjadwalan yang lebih realistis dan tahan risiko untuk fase DED pada proyek lepas pantai.
Co-Authors Mohammad Rosyid, Daniel Wahyu Utomo Wisudanto Wisudanto