Rudi Prasetio
Jurusan Teknik Elektro, Universitas Diponegoro Semarang Jl. Prof. Sudharto, SH, kampus UNDIP Tembalang, Semarang 50275, Indonesia

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Optimization of Maintenance Inspection Scheduling Decision by Integrating Predictive Maintenance and Operational Management Constraints: Case Study of Storage Tank Maintenance in Central Java Prasetio, Rudi; Sunitioso, Yos; Yuniarto, Ahmad
Jurnal Locus Penelitian dan Pengabdian Vol. 4 No. 9 (2025): : JURNAL LOCUS: Penelitian dan Pengabdian
Publisher : Riviera Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58344/locus.v4i9.4692

Abstract

This study aims to optimize the cleaning and inspection schedule of storage tanks by integrating predictive maintenance with operational decision-making. The research addresses the challenges faced by the Oil and Gas Company in balancing asset reliability with continuous operational demands, using a mixed methods approach. Predictive modeling, conducted using RapidMiner, classified tank conditions based on technical data such as bottom plate thickness, corrosion rates, and coating conditions from previous reports (2022–2024), achieving a model accuracy of 94%. Simultaneously, the Analytical Hierarchy Process (AHP) was employed to evaluate operational criteria, including product demand, stock availability, redundant tank presence, overdue cleaning, vendor readiness, and alternative supply plans. Seven regional Terminal Managers participated as respondents to determine the prioritization of these factors and the weighting of each criterion. The results of AHP indicate that the technical condition of tanks (24.4%) and overdue cleaning (18.4%) are the most influential criteria in the decision-making process. By integrating AHP with predictive maintenance simulations, the study proposes a structured, proactive, and risk-based model to guide tank maintenance decisions. This model enhances reliability, minimizes operational disruptions, and ensures optimal resource utilization.
Efektifitas Tanaman Refugia Border Plant Terhadap Pengendalian Hama Spodoptera Exigua Dan Liriomyza Chinensis Serta Hasil Tanaman Bawang Merah (Allium Ascalonicum L.) Titisari, Prima Wahyu; Prasetio, Rudi
Produksi Tanaman Vol. 13 No. 08 (2025): Agustus
Publisher : Jurusan Budidaya Pertanian Fakultas Pertanian Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/

Abstract

Tanaman bawang merah (Allium ascalonicum L) merupakan salah satu komoditas tanaman hortikultura yang banyak dikonsumsi manusia sebagai campuran bumbu masakan. Hama Spodoptera exigua dan Liriomyza chinensis adalah jenis hama yang sering merusak dan menyerang tanaman bawang merah, terutama pada bagian daun bawang. Maka diperlukan adanya teknik pengendalian hama selain menggunakan pestisida, yaitu dengan cara pemanfaatan tanaman refugia sebagai pengendali alami hama pada tanaman bawang merah. Penelitian ini bertujuan untuk menurunkan serangan Organisme Penggangu Tumbuhan (OPT) pada pertanaman bawang merah, dan mengurangi penggunaan pestisida pada petani, juga sebagai teknologi tepat guna pada petani dengan mengelola agroekosistem pertanian menuju pertanian yang berkelanjutan (Sustainable agriculture). Serta untuk mengetahui keefektifitasan tanaman refugia dengan metode border plant sebagai pengendalian hama Spodoptera Exigua dan Liriomyza Chinensis serta hasil tanaman bawang merah. Penelitian ini telah dilaksanakan di Kebun Percobaan Fakultas Pertanian Universitas Islam Riau. Metode yang digunakan yaitu Rancangan Acak Kelompok (RAK) dimana terdapat 5 perlakuan, setiap perlakuan diulang sebanyak 5 kali. Jumlah petak percobaan sebanyak 25, dalam satu petak percobaan terdapat 4 tanaman. Parameter yang diamati adalah jumlah hama, intensitas serangan hama, persentase serangan hama, umur panen, jumlah umbi per rumpun, berat basah umbi per rumpun, berat kering umbi per rumpun, susut bobot umbi. Data pengamatan dianalisis secara statistik dan dilakukan dengan uji lanjut Beda Nyata Jujur (BNJ) pada taraf 5%. Hasil penelitian ini menunjukkan bahwa dari berbagai macam perlakuan yang digunakan R1 dan R2 merupakan perlakuan yang lebih dominan di sukai oleh hama dengan persentase serangan 75% pada kedua hama utama tanaman bawang merah.
Pengaruh Persepsi Return, Risiko, Pengetahuan dan Religiusitas Terhadap Minat Berinvestasi di Pasar Modal Syariah Prasetio, Rudi; Iswanji, Chaidir; Khotijah, Siti Afidatul
Al-Intaj : Jurnal Ekonomi dan Perbankan Syariah Vol 9, No 1 (2023)
Publisher : Faculty of Economics and Islamic Business, UIN Fatmawati Sukarno Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29300/aij.v9i1.2706

Abstract

In its development, the Islamic capital market in Indonesia has experienced various obstacles, especially during the Covid-19 pandemic that hit the world in recent years, which is thought to be the main cause due to the low level of knowledge of the Islamic capital market and public interest in the Islamic capital market. Therefore, the purpose of this study is to find out what factors are expected to influence the dependent variable, namely the interest in investing in the Islamic capital market, which includes perceived return, perceived risk, investment knowledge, and religiosity. This research is a type of quantitative research using primary data from research objects which are KSPM Ahmad Dahlan University (UAD) and Yogyakarta Muhammadiyah University (UMY) with a total sample of 60 respondents using a sampling technique that is simple random sampling. Tests carried out include descriptive statistical tests, validity and reliability tests, classical assumption tests, multiple linear regression tests, hypothesis testing (F test and t test), and test the coefficient of determination. Based on the results of this study, the results show that: Partially only the variable perceived return has a positive and significant effect on the dependent variable so that H1 is accepted, and for H2, H3, and H4 it is partially obtained that these variables have no effect on the dependen variable, therefore H2, H3, and H4 rejected..