in the recent decade, special attention is paid to reverse logistic due to economic benefits of recovery and recycling of used products as well as environmental legislation and social concerns. on the other hand، many researches claim that separately and sequential planning of forward and reverse logistic causes sub-optimality. effective transport activities are also one of the most important c...

Peningkatan kendaraan bermotor berdampak pada peningkatan frekuensi konsumsi BBM, seperti saat weekend, arus mudik. Depot BBM X bertugas mengirimkan ke sejumlah SPBU yang tersebar di wilayah Yogyakarta, diminta untuk dapat menjaga kelancaran dan ketepatan waktu dalam pendistribusiannya segala situasi kondisi. kerap kali berhadapan dengan kendala pengiriman terlalu lama, juga disebabkan oleh rut...

Optimization of on-demand transportation systems and ride-sharing services involves solving a class of complex vehicle routing problems with pickup and delivery with time windows (VRPPDTW). This paper first proposes a new time-discretized multi-commodity network flow model for the VRPPDTW based on the integration of vehicles’ carrying states within space–time transportation networks, so as to a...

How to reduce the accidents of hazardous materials has become an important and urgent research topic in safety management materials. In this study, we focus on half open multi-depot heterogeneous vehicle routing problem for transportation. The goal is determine allocation optimal route with minimum risk cost A novel transportation model presented considering variation loading, types, category. ...