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All Journal JURNAL PASTI (PENELITIAN DAN APLIKASI SISTEM DAN TEKNIK INDUSTRI) Journal of Social Research
Iswari, Titi
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Humanities Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Industrial & Manufacturing Engineering Social Sciences Transportation

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Development Of A Vehicle Routing Problem Model To Reduce Service Delays In Pickup And Delivery Operations Stefhen, Gilbert; Suryadi, Dedy; Iswari, Titi
Journal of Social Research Vol. 4 No. 8 (2025): Journal of Social Research
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/josr.v4i7.2683

Abstract

The rapid growth of the e-commerce sector in Indonesia has increased the demand for reliable and timely logistics services. However, challenges such as delayed pickups and deliveries continue to occur, leading to the accumulation of operational penalties. This study aims to develop a mathematical model based on the Vehicle Routing Problem (VRP) that addresses the complexities of modern logistics distribution. The proposed model, named HFMTVRPDPTW (Heterogeneous Fleet Multi-Trip Vehicle Routing Problem with Delivery and Pickup and Time Windows), incorporates five key elements: vehicle capacity, fleet heterogeneity, service time windows, simultaneous pickup and delivery, and multi-trip operations within a single working period. A systematic literature review of twenty-one prior studies was conducted to identify research gaps and inform the model’s development. The model is formulated using an integer linear programming (ILP) approach and aims to optimize service time accuracy while minimizing delays. The findings suggest that this model provides a more comprehensive and realistic approach to distribution challenges and offers an original contribution to the development of adaptive and efficient VRP models for logistics operations.
Pengembangan Model Sinkronisasi Distribusi Dua Eselon pada Urban Consolidation Center (UCC) di Sistem Logistik Perkotaan Iswari, Titi
Jurnal PASTI (Penelitian dan Aplikasi Sistem dan Teknik Industri) Vol 19, No 2 (2025): Jurnal PASTI
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/pasti.2025.v19i2.002

Abstract

Distribusi logistik dua eselon di kawasan perkotaan menghadapi tantangan kompleks, seperti keterbatasan kapasitas kendaraan, kapasitas penyimpanan, dan optimasi rute distribusi. Penelitian ini bertujuan mengembangkan model matematis untuk menyinkronkan distribusi dua eselon pada sistem Urban Consolidation Center (UCC), dengan mengintegrasikan aspek inventori dan perutean kendaraan secara simultan. Model mencakup tiga skema distribusi pada eselon pertama (Direct & No Inventory, Direct–Inventory, dan Route–Inventory). Optimasi pada eselon pertama diselesaikan menggunakan AMPL dengan solver CPLEX, sedangkan persoalan distribusi pada eselon kedua diseleaikan dengan pendekatan Economic Order Quantity (EOQ) dan algoritma Large Neighborhood Search (LNS). Eksperimen dilakukan dengan berbagai skenario, seperti jumlah retailer, supplier, dan biaya penyimpanan. Skema ketiga (Route & Inventory) terbukti menghasilkan total biaya logistik paling rendah, dengan efisiensi biaya yang konsisten di berbagai konfigurasi, mencapai penghematan sebesar 20 - 60%. Model ini berkontribusi dalam perancangan sistem logistik perkotaan yang lebih hemat biaya dan efisien.
Co-Authors Budi, Stephen Sanjaya Dedy Suryadi Frescia Falen, Frylie Paulina Kus Ariningsih, Paulina Kus Purnamasari, Mega stefhen, Gilbert