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Alberto, Giovano
Universitas Katolik Parahyangan
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Model Matematis untuk Multi-product Multi-warehouse Inventory Routing Problem Giovano Alberto
Jurnal Rekayasa Sistem Industri Vol. 12 No. 1 (2023): Jurnal Rekayasa Sistem Industri
Publisher : Universitas Katolik Parahyangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (302.128 KB) | DOI: 10.26593/jrsi.v12i1.6371.27-34

Abstract

Every business always aims to make significant profits. The corporation can cut expenses in one way or another. Logistics is one of the most expensive operations, and two-thirds of its expenditures are related to inventory and transportation. Inventory and transportation challenges must be addressed simultaneously in the supply chain to achieve the best results.This problem is modeled in the inventory routing problem (IRP). The development of the IRP model still has gaps with real conditions. The IRP model designed has not yet discussed the Multi-product Multi-warehouse Inventory Routing Problem (MMIRP) model. MMIRP takes into account the conditions of the types of goods that need to be sent, which vary and there are several warehouses that have goods of different types in one period of time. The results obtained after completing the model are the number of vehicles used, the number of goods of each type shipped, the travel routes generated by each vehicle, and the large costs generated based on the route design and inventory at each location.
Dynamic Scoring and Costing in the Orienteering Problem: A Model Based on Length of Stay Giovano Alberto; Carles Sitompul
Jurnal Optimasi Sistem Industri Vol. 22 No. 2 (2023): Published in December 2023
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/josi.v22.n2.p114-125.2023

Abstract

In today's travel and tourism landscape, the role of travel agents has become increasingly complex as they are challenged to explore a variety of potential destinations. More specifically, the complicated task of planning itineraries that truly satisfy travellers puts travel agents in a crucial role, increasing the complexity of itinerary planning. This complexity is compounded not only by the multitude of possible destinations, but also by non-negotiable constraints such as cost and time. To address these challenges, the orienteering problem represents a fundamental mathematical model that provides a theoretical basis for understanding the nuanced difficulties faced by travel agents.This study ventures into a novel iteration of the orienteering problem, with a particular focus on optimizing travel satisfaction based on length of stay. A notable aspect of this variant is the inclusion of time and cost constraints in the route determination process. Using an integer programming model, the satisfaction scores for each location are described by a diminishing returns function linked to length of stay, while the costs associated with each location follow a linear function influenced by the same parameter. The application of this model is in a hypothetical scenario with 32 nodes, with the calculations facilitated by the FilMINT solver. A sensitivity analysis examines time and cost constraints and shows their decisive influence on the optimization of travel routes. The results of this research contribute significantly to a strategic framework and provide travel agencies with the opportunity to create itineraries that not only meet practical limits but, more importantly, increase traveller satisfaction.
PEMBUATAN MATA PELAJARAN EKSTRAKURIKULER UNTUK MEMPERKENALKAN KEILMUAN TEKNIK INDUSTRI DI SMA ISR KARAWANG Tjandra, Sugih Sudharma; Sukapto, Paulus; Fransiscus, Hanky; Siswanto, Daniel; Loice, Romy; Alberto, Giovano
BERNAS: Jurnal Pengabdian Kepada Masyarakat Vol. 5 No. 2 (2024)
Publisher : Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31949/jb.v5i2.8805

Abstract

Dunia pendidikan di Indonesia saat ini telah memasuki Kurikulum Merdeka, begitu juga dengan Sekolah Menengah Atas. Kurikulum Merdeka dinilai lebih sederhana dan fleksibel sehingga membuat siswa lebih aktif. Jenis-jenis aktivitas yang ada di dalam kurikulum ini lebih relevan dan banyak memberikan ruang untuk tugas berbasis proyek. Namun munculnya Kurikulum Merdeka ini menimbulkan permasalahan yaitu belum siapnya sekolah mengimplementasikan Kurikulum Merdeka khususnya dari segi mata pelajaran dan sumber daya. Begitu juga terjadi pada SMA IGNATIUS SLAMET RIYADI, Resinda Karawang. Sekolah sangat membutuhkan kerja sama dengan Universitas dari segi keilmuan dan juga sumber daya. Dengan perencanaan Kurikulum Merdeka yang baik dengan didukung mata pelajaran berbasis proyek yang menarik minat siswa tentunya dapat meningkatkan kompetensi siswa SMA IGNATIUS SLAMET RIYADI dan menarik perhatian orang tua siswa SMP untuk menyekolahkan anaknya di SMA IGNATIUS SLAMET RIYADI, Karawang. Oleh karena itu, Program Studi Teknik Industri Universitas Katolik Parahyangan menjalin kerja sama untuk menghasilkan mata pelajaran berbasis proyek, khususnya yang berhubungan dengan keilmuan Teknik Industri. Dengan demikian, selain membantu sekolah, Program Studi Teknik Industri UNPAR juga dapat meningkatkan eksistensi dan menarik minat siswa SMA terhadap keilmuan Teknik Industri sehingga pada saatnya tiba para siswa berminat melanjutkan studi di Program Studi Teknik Industri UNPAR. Pengabdian ini dilakukan dalam 4 bagian, yaitu identifikasi kebutuhan, pembangkitan ide, pembuatan purwarupa, dan evaluasi produk. Diperoleh sebanyak 6 produk, yaitu Self Cleaning Bookshelf: rak buku yang mudah dibersihkan, Cable Roller: alat bantu untuk membawa kabel dari peralatan elektronik agar tersimpan rapi saat dibawa dalam tas, Pemotong Otomatis untuk buah dan sayuran yang mudah dibersihkan, Headphone Holder: penyangga Headphone, Jas Hujan: modular dan praktis, dan Pemotong: Alat pemotong yang aman digunakan anak-anak.
Career Path Workshop Bagi Siswa/i SMA Temasek Independent School Kota Bandung Alberto, Giovano; Agung, Chris; Debby, Teresia; Kartawidjaja, Jesslyn
Jurnal Atma Inovasia Vol. 5 No. 2 (2025)
Publisher : Lembaga Penelitian dan Pengabdian pada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/jai.v5i2.10221

Abstract

Berdasarkan survey dari Integrity Development Flexibility terdapat 87% mahasiswa/i di Indonesia mengaku salah dalam memilih jurusan kuliah dan ini berdampak pada banyaknya jumlah lulusan perguruan tinggi bekerja tidak sesuai dengan jurusan yang dipilih. Salah satu penyebabnya adalah kurangnya pengetahuan mengenai aspirasi karir sebelum memilih jurusan kuliah. Siswa/i sekolah menengah atas (SMA) dirasa perlu untuk memiliki aspirasi karir yang jelas, sehingga pelatihan yang bertujuan untuk menggali aspirasi karir dirasa penting untuk dilakukan. Salah satu SMA yang membutuhkan pelatihan ini adalah SMA Temasek Independent School (TIS), Kota Bandung. SMA TIS sebelumnya telah melakukan tes minat dan bakat, namun masih cukup banyak siswa/i yang belum dapat menentukan jurusan kuliahnya. Berdasarkan temuan ini, tim pengabdi Universitas Katolik Parahyangan menyelenggarakan workshop career path dengan menggunakan modul khusus yang mempermudah siswa/i dalam mengidentifikasi jurusan kuliah dan perguruan tinggi yang dituju. Workshop terdiri dari dari 3 bagian yakni: (1) mengisi kuesioner, (2) interpretasi hasil pengisian kuesioner, dan (3) mengisi modul perguruan tinggi tujuan. Sebelum mengikuti workshop hanya ada 3 siswa yang sudah mengetahui jurusan yang akan dipilih, setelah mengikuti workshop ini para peserta (10 siswa/i) memiliki arah yang lebih jelas terkait jurusan yang akan dipilih untuk jenjang perkuliahan kedepannya serta dapat menyusun strategi yang tepat sasaran.
Career Path Workshop Bagi Siswa/i SMA Temasek Independent School Kota Bandung Alberto, Giovano; Agung, Chris; Debby, Teresia; Kartawidjaja, Jesslyn
Jurnal Atma Inovasia Vol. 5 No. 2 (2025)
Publisher : Lembaga Penelitian dan Pengabdian pada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24002/jai.v5i2.10221

Abstract

Berdasarkan survey dari Integrity Development Flexibility terdapat 87% mahasiswa/i di Indonesia mengaku salah dalam memilih jurusan kuliah dan ini berdampak pada banyaknya jumlah lulusan perguruan tinggi bekerja tidak sesuai dengan jurusan yang dipilih. Salah satu penyebabnya adalah kurangnya pengetahuan mengenai aspirasi karir sebelum memilih jurusan kuliah. Siswa/i sekolah menengah atas (SMA) dirasa perlu untuk memiliki aspirasi karir yang jelas, sehingga pelatihan yang bertujuan untuk menggali aspirasi karir dirasa penting untuk dilakukan. Salah satu SMA yang membutuhkan pelatihan ini adalah SMA Temasek Independent School (TIS), Kota Bandung. SMA TIS sebelumnya telah melakukan tes minat dan bakat, namun masih cukup banyak siswa/i yang belum dapat menentukan jurusan kuliahnya. Berdasarkan temuan ini, tim pengabdi Universitas Katolik Parahyangan menyelenggarakan workshop career path dengan menggunakan modul khusus yang mempermudah siswa/i dalam mengidentifikasi jurusan kuliah dan perguruan tinggi yang dituju. Workshop terdiri dari dari 3 bagian yakni: (1) mengisi kuesioner, (2) interpretasi hasil pengisian kuesioner, dan (3) mengisi modul perguruan tinggi tujuan. Sebelum mengikuti workshop hanya ada 3 siswa yang sudah mengetahui jurusan yang akan dipilih, setelah mengikuti workshop ini para peserta (10 siswa/i) memiliki arah yang lebih jelas terkait jurusan yang akan dipilih untuk jenjang perkuliahan kedepannya serta dapat menyusun strategi yang tepat sasaran.
Dynamic Scoring and Costing in the Orienteering Problem: A Model Based on Length of Stay Giovano Alberto; Carles Sitompul
Jurnal Optimasi Sistem Industri Vol. 22 No. 2 (2023): Published in December 2023
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (605.703 KB) | DOI: 10.25077/josi.v22.n2.p114-125.2023

Abstract

In today's travel and tourism landscape, the role of travel agents has become increasingly complex as they are challenged to explore a variety of potential destinations. More specifically, the complicated task of planning itineraries that truly satisfy travellers puts travel agents in a crucial role, increasing the complexity of itinerary planning. This complexity is compounded not only by the multitude of possible destinations, but also by non-negotiable constraints such as cost and time. To address these challenges, the orienteering problem represents a fundamental mathematical model that provides a theoretical basis for understanding the nuanced difficulties faced by travel agents.This study ventures into a novel iteration of the orienteering problem, with a particular focus on optimizing travel satisfaction based on length of stay. A notable aspect of this variant is the inclusion of time and cost constraints in the route determination process. Using an integer programming model, the satisfaction scores for each location are described by a diminishing returns function linked to length of stay, while the costs associated with each location follow a linear function influenced by the same parameter. The application of this model is in a hypothetical scenario with 32 nodes, with the calculations facilitated by the FilMINT solver. A sensitivity analysis examines time and cost constraints and shows their decisive influence on the optimization of travel routes. The results of this research contribute significantly to a strategic framework and provide travel agencies with the opportunity to create itineraries that not only meet practical limits but, more importantly, increase traveller satisfaction.
An Application of Binary Cuckoo Search Algorithm to Orienteering Problem Giovano Alberto; Alfian Tan
(IJCSAM) International Journal of Computing Science and Applied Mathematics Vol. 7 No. 2 (2021)
Publisher : LPPM Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This research applies the cuckoo search metaheuristics model to find solutions to the Orienteering Problem (OP). The OP formulation is useful to model a situation in which someone wants to determine an optimal city route that is subject to a specified time constraint. OP can be categorized into NP Hard Problem which takes a very long time to analytically find the optimal solution as the number of entities involved increases. Therefore, metaheuristics often become an option to deal with this situation. A cuckoo search model based algorithm is developed in this research. An adjustment for discrete combinatorial problem is performed by adopting an idea of binary cuckoo search method. In addition, three types of local search methods are considered to improve the searching performance. This algorithm can eventually find better solutions for some of the 18 cases than two other benchmarked algorithms. Furthermore, experiment on model parameters shows that the worse nest fraction (P_alpha) affects the quality of solutions obtained.
Application of the Vendor Managed Inventory (VMI) Model Based on Total Distribution Cost Optimization Giovano Alberto; Alexander Jimmy
Maritime Park: Journal of Maritime Technology and Society Volume 5, Issue 2, 2026
Publisher : Department of Ocean Engineering, Faculty of Engineering, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study develops an optimization-based Vendor-Managed Inventory (VMI) model to improve coordination between inventory and transportation decisions in an upstream automotive distribution network in West Java. The problem is formulated as a multi-period Inventory Routing Problem (IRP) and solved using AMPL with CPLEX. The model minimizes total logistics cost, including transportation and inventory holding costs. A benchmark comparison with the company’s existing decentralized replenishment policy is conducted. Results show that the proposed VMI model reduces total monthly logistics cost by 10.66%, from IDR 2.74 billion to IDR 2.44 billion. In addition, service performance improves significantly, with demand fulfilment increasing from 91.3% to 99.2% and stock-out occurrences eliminated. The findings highlight the importance of integrated decision-making in freight distribution systems and provide practical insights for transport capacity planning and inventory positioning.
Co-Authors Agung, Chris Alexander Jimmy Alfian Tan Carles Sitompul Daniel Siswanto Debby, Teresia Hanky Fransiscus Kartawidjaja, Jesslyn Paulus Sukapto Romy Loice Sudharma, Sugih