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All Journal Jurnal Teknik Industri Multidiciplinary Output Research for Actual and International Issue (Morfai Journal) Jurnal Transportasi Multimoda
Liane Okdinawati
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Religion Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Social Sciences Transportation Other

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Adaptation Of The Variable Neighborhood Search Heuristic To Solve The Vehicle Routing Problem Arif Imran; Liane Okdinawati
Jurnal Teknik Industri Vol. 12 No. 1 (2011): Februari
Publisher : Department Industrial Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/JTIUMM.Vol12.No1.10-15

Abstract

The vehicle routing problem is investigated by using some adaptations of the variable neighborhood search (VNS). The initial solution was obtained by Dijkstra’s algorithm based on cost network constructed by the sweep algorithm and the 2-opt. Our VNS algorithm use several neighborhoods which were adapted for this problem. In addition, a number of local search methods together with a diversification procedure were used. The algorithm was then tested on the data sets from the literature and it produced competitive results if compared to the solutions published.
Covid-19 dan Pengaruhnya Terhadap Bisnis Angkutan Logistik di Indonesia Subiakto Soekarno; Liane Okdinawati; Prawira Fajarindra Belgiawan; Dedy Sushandoyo; Oktofa yudha Sudrajad; Harimukti Wandebori; Muhamad Rizki; Umiyatun hayati Triastuti; Dedy Cahyadi; Listantari Listantari; Yessi Gusleni; Win Akustia; Herma Juniati; Elviana R. Simbolon; Herawati Herawati; Rita Pasaribu; Reslyana Dwitasari; Irawati Andriani; Maria Magdalena; Hasriwan putra; Yuveline Aurora; Sugiyanto sugiyanto; Akhmad Rizal Arifudin; Suci Susanti; Marlia Herwening; Anzy Indrashanty; Agung wicaksono
Jurnal Transportasi Multimoda Vol 18, No 2 (2020): Desember
Publisher : Puslitbang Transportasi Antarmoda-Kementerian Perhubungan Republik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3721.059 KB) | DOI: 10.25104/mtm.v18i2.1719

Abstract

Pandemi COVID-19 membuat masyarakat mengurangi aktivitas ekonomi, seperti berbelanja kebutuhan tersier atau berlibur. Penerapan Pembatasan Sosial Berskala Besar (PSBB) di DKI Jakarta yang sudah berjalan dan disambut positif oleh masyarakat, dimana bidang logistik merupakan salah satu sektor yang dikecualikan dalam aturan PSBB sehingga dapat dengan leluasa melakukan distribusi dengan tetap mengikuti protokol COVID-19. Walaupun sektor logistik mendapat pengecualian pada masa PSBB ini, dari sisi arus pengiriman barang dalam negeri maupun skala ekspor sayangnya mengalami tren penurunan. Oleh karena itu penelitian ini mencoba melihat bagaimana dampak COVID-19 dan pengaruhnya terhadap angkutan logistik. Penelitian ini juga ingin melihat apakah angkutan logistik yang dikecualikan dalam PSBB memiliki pengaruh pada meluasnya penyebaran COVID-19. Data-data dari Badan Pusat Statistika dan wawancara beberapa pelaku logistik dipergunakan untuk melihat pengaruhnya terhadap keberlangsungan bisnis selama pandemik. Sedangkan, metode regresi linear dipergunakan untuk fokus pada tujuan kedua dari penelitian ini. Berdasarkan analisa yang dilakukan maka diketahui bahwa sektor lapangan usaha transportasi dan pergudangan menunjukkan tanda-tanda pemulihan di kuartal III 2020. Sedangkan berdasarkan regresi linier menunjukan bahwa pergerakan logistik tidak berpengaruh terhadap lonjakan kasus COVID-19.
DEVELOPING AN OPERATIONAL STRATEGY TO ENHANCE MAINTENANCE EFFICIENCY: A CASE STUDY OF PROF RENTAL BALIKPAPAN Eva Ervina; Liane Okdinawati
Multidiciplinary Output Research For Actual and International Issue (MORFAI) Vol. 6 No. 2 (2026): Multidiciplinary Output Research For Actual and International Issue
Publisher : RADJA PUBLIKA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.18446426

Abstract

Micro-enterprises in Indonesia play a critical role in economic development, yet they often face operational inefficiencies that threaten sustainability. Prof Rental Balikpapan, a motorcycle rental start-up operating in East Kalimantan, exemplifies these challenges. Despite strong market demand and revenue growth during its initial seven months, the company experienced severe volatility in maintenance costs, which exceeded budget allocations by 394% between January and July 2025. This unpredictability undermines profitability and constrains fleet expansion, highlighting the need for a structured operational strategy to stabilize costs and improve reliability. This research aims to address three core questions: (1) What factors contribute to high and inconsistent maintenance costs at Prof Rental Balikpapan? (2) How can a preventive maintenance schedule be structured to reduce costs and ensure timely servicing? (3) How can a standardized Standard Operating Procedure (SOP) be developed to institutionalize maintenance discipline? To answer these questions, a mixed-method approach was employed, combining qualitative diagnostics and quantitative reliability analysis. Primary data were collected through semi-structured interviews with the founder, operational staff, and external mechanic, while secondary data included financial records, maintenance logs, and OEM guidelines. Qualitative analysis using content analysis and BPMN process mapping revealed systemic weaknesses: reactive maintenance behavior, absence of usage-based scheduling, reliance on external workshops for diagnosis, and fragmented documentation. These factors collectively drive cost volatility and operational risk. Quantitative analysis reinforced these findings. Descriptive statistics and Pareto analysis showed that 36.89% of total maintenance costs were concentrated in engine overhauls, while failure interval variability exceeded 50% for high-risk units, confirming the lack of preventive control mechanisms. To address these issues, the study designed a preventive maintenance schedule using Failure Interval Analysis (FIA), which calculates maintenance intervals based on rental-day exposure rather than calendar assumptions. The proposed plan differentiates intervals by unit reliability, introducing monthly checks for high-risk units and quarterly checks for newer assets. Cost projections indicate that shifting from reactive to preventive maintenance reduces total expenditure by approximately 60%, from IDR 7,103,000 to IDR 3,470,000 over six months, while improving predictability and minimizing downtime. This preventive plan will be implemented for a short-term horizon of six months, followed by an evaluation in month seven to validate cost performance improvements. To institutionalize execution discipline, a standardized SOP was developed, integrating preventive triggers, approval thresholds, and documentation protocols. The SOP formalizes roles, introduces Maintenance Work Orders (MWO) for budget locking, and mandates a “reset mechanism” to ensure continuity of preventive cycles. These measures collectively transform maintenance from an ad-hoc, reactive process into a structured, system-driven operation. The contribution of this research lies in demonstrating how micro-enterprises can apply reliability-based preventive strategies and process standardization to achieve cost stability and operational resilience. By integrating FIA-driven scheduling with SOP governance, this study provides a practical framework for improving maintenance efficiency in resource-constrained service businesses. Future research is recommended to conduct longitudinal evaluations and explore digitalization or IoT-based solutions for real-time maintenance monitoring.
Co-Authors Akhmad Rizal Arifudin Anzy Indrashanty Arif Imran Belgiawan, Prawira Fajarindra Dedy Cahyadi Dedy Sushandoyo Elviana R. Simbolon Eva Ervina Harimukti Wandebori Hasriwan Putra Herawati Herawati Herma Juniati Irawati Andriani Listantari Listantari Maria Magdalena Marlia Herwening MUHAMAD RIZKI Oktofa yudha Sudrajad Reslyana Dwitasari Rita Pasaribu Salsabila, Unik Hanifah Subiakto Soekarno Suci Susanti Sugiyanto Sugiyanto Taufiq Byomantoro Hanurogo Umiyatun hayati Triastuti Win Akustia Wisnhu Purbo Waseso Yessi Gusleni yuveline aurora