Siti, Nurminarsih (2015) Pengembangan model dan algoritma Dynamic-Inventory Ship Routing Problem (D-ISRP). Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Ketidakpastian tingkat kesibukan pelabuhan atau dwelling time
menyebabkan ketidaksesuaian operasional kapal terhadap jadwal yang telah
direncanakan. Lamanya waktu tunggu di pelabuhan mengakibatkan utilitas kapal
menjadi rendah dan biaya distribusi meningkat karena pemberlakuan biaya
pelabuhan. Dampak lainnya adalah memperbesar kemungkinan keterlambatan
kapal yang berpotensi untuk menyebabkan terjadinya inventory stock out. Jika
supplier menerapkan kebijakan vendor managed inventory (VMI), maka dalam
hal ini supplier akan menanggung biaya penalti akibat keterlambatan tersebut.
Untuk menghindari terjadinya keterlambatan, diperlukan evaluasi terhadap jadwal
eksisting apabila terdapat informasi perubahan dwelling time. Oleh karena itu,
pada penelitian ini dikembangkan model dynamic-inventory ship routing problem
(D-ISRP), dimana proses re-routing berdasarkan informasi dwelling time akan
dilakukan dengan mengevaluasi opsi perubahan kecepatan dan opsi perubahan
urutan kunjungan. Kedua opsi tersebut kemudian dibandingkan untuk menentukan
jadwal baru jika terjadi perubahan dwelling time. Model yang dikembangkan
mempertimbangkan beberapa komponen biaya antara lain biaya konsumsi bahan
bakar saat pelayaran, konsumsi bahan bakar saat berlabuh, biaya operasional
kapal, biaya kepelabuhanan, biaya loading/unloading, serta biaya penalti
keterlambatan.
Permasalahan D-ISRP merupakan permasalahan NP-hard, maka pada
penelitian ini dikembangkan juga algoritma heuristic berbasis interaction theory
sebagai teknik solusi. Berdasarkan percobaan numerik yang dilakukan,
disimpulkan bahwa algoritma yang dikembangkan dapat menyelesaikan
permasalahan D-ISRP dan pada keseluruhan kondisi, opsi perubahan kecepatan
menghasilkan performansi yang lebih baik dalam merespon perubahan informasi
dwelling time.
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Uncertain dwelling time in a port can cause error in scheduling. The
queue on a port will reduce ship utilization and increase the distribution cost
because of higher port charge. Ship can also be late on other port that cause
inventory stock out. These risks are disadvantages for supplier who implement
Vendor Managed Inventory agreement. The supplier will be charged for lateness
penalty cost. In order to cope with this problem, a model for dynamic inventory
ship routing problem (D-ISRP) is developed in this research. The model will
evaluate two alternative options, changing ship speed or changing route visiting
sequence, if new information of dwelling time occured. The cost function to
evaluate the scheduling options consists of sail bunker consumption, port bunker
consumption, ship operational cost, port charge, loading/unloading cost, and
penalty cost for late delivery.
To solve this problem, an heuristic algorithm based on interaction theory
has been developed. The algorithm determines the schedule based on the
interaction coefficient of ships and ports. Finally, by some numerical experiments,
we concluded that the algorithm has a high reliability in order to cope with DISRP
and in general situations changing ship speed option will give better
performance rather than changing ship route visiting sequence option.
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | RTI 519.83 Nur p |
| Uncontrolled Keywords: | dwelling time; vendor managed inventory; dynamic multi depot inventory ship routing problem; interaction theory |
| Subjects: | H Social Sciences > HD Industries. Land use. Labor > HD30.213 Management information systems. Dashboards. Enterprise resource planning. T Technology > T Technology (General) > T58.6 Management information systems |
| Divisions: | Faculty of Industrial Technology > Industrial Engineering > 26101-(S2) Master Thesis |
| Depositing User: | - Taufiq Rahmanu |
| Date Deposited: | 18 Oct 2018 03:34 |
| Last Modified: | 18 Oct 2018 03:34 |
| URI: | http://repository.its.ac.id/id/eprint/59895 |
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