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All Journal Jurnal Rekayasa Sistem Industri Jurnal Optimasi Sistem Industri Jurnal Ilmiah Teknik Industri INVOTEK: Jurnal Inovasi Vokasional dan Teknologi Jurnal Sistem Teknik Industri Jurnal Optimalisasi MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Jurnal Optimasi Teknik Industri (JOTI) Warta Pengabdian Andalas: Jurnal Ilmiah Pengembangan Dan Penerapan Ipteks Andalasian International Journal of Applied Science, Engineering, and Technology Journal of Creative Power and Ambition (JCPA)
Eri Wirdianto
Universitas Andalas
Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering Medicine & Pharmacology Social Sciences Transportation Other

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Usulan Rute Pendistribusian Gas LPG Menggunakan Algoritma Dijkstra dan Algoritma Genetika Pada  Model CGVRP Oktaviani, Putri; Dalnis, Intan Permata; Wirdianto, Eri
Jurnal Rekayasa Sistem Industri Vol. 14 No. 1 (2025): Jurnal Rekayasa Sistem Industri
Publisher : Universitas Katolik Parahyangan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26593/jrsi.v14i1.8491.131-145

Abstract

Determining the route of distribution of goods for companies is an important aspect to consider. The distribution of 3 kg LPG gas at one of the companies in Bandung City does not yet have an optimal route. However, in previous research, a shorter route has been obtained with the Sweep algorithm, which is 118.85 km. The research continued using the Cluster Generalized Vehicle Routing Problem (CGVRP) model with the Dijkstra and Genetics algorithms. CGVRP is the determination of the shortest route using customer clusters. Dijkstra's algorithm is the determination of the route between 2 points from the starting point to the destination point. The result of the distance calculation with the Djkstraa algoritma is 114.779 km. Genetic Algorithm is the determination of the shortest route by reducing the attributes that are less dominant. The result of the distance calculating with Genetic Algorithm is 112 km. This shows a reduction in the total distribution mileage of 6.85 km compared to the completion of the Sweep algorithm in previous studies. The amount of this reduction is large enough to save the company's costs by 5.76%.
Penerapan Siklus Plan-Do-Check-Act (PDCA) untuk Mengurangi Pemborosan dalam Industri Jasa Rahmayanti, Dina; Wirdianto, Eri; Afrileni, Wirna
Jurnal Optimalisasi Vol 11, No 2 (2025): Oktober
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v11i2.12337

Abstract

This research aims to increase the efficiency of aging time in the car refurbished process in T XYZ by applying the PDCA (Plan-Do-Check-Action) method. The company's main problem is the high number of idle cars due to aging times that exceed standards, especially in repair, service, and preparation activities. The research methods used include identifying the root of the problem using a fishbone diagram, designing solutions using the 5W+1H approach, improving implementation, and evaluating results. Implementation results show a decrease in the average aging time: in repair from 5,333 to 3,833 days, in service from 6 to 3,333 days, and preparation from 1,333 to 0.967 days. The number of idle cars also decreased gradually to reach 86 units with an actual aging time of one day. These findings prove that implementing PDCA effectively increases the efficiency of the refurbished process, reduces time waste, and supports increased company operational performance. This research contributes to developing continuous improvement practices in the automotive industry. It can be a reference for other service companies that are optimizing productivity through a quality management approach.
Solving Heterogenous Fleet Capacitated Vehicle Routing Problem with Time Windows Using Cooperative Hybrid Firefly Algorithm Ananda, Defri; Wirdianto, Eri; Alfandi, Rahmad
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 5 No. 3 (2025): November 2025
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v5i3.154

Abstract

The Vehicle Routing Problem with Time Windows (VRPTW) is a widely studied logistics optimization problem, and its complexity increases when heterogeneous fleets are considered. This study proposes the application of the Cooperative Hybrid Firefly Algorithm (CHFA), an extension of the Firefly Algorithm, to solve the Heterogeneous Vehicle Routing Problem with Soft Time Windows (HVRPSTW). The mathematical model was implemented in Python, tested on benchmark datasets, and adapted to a fleet consisting of three vehicle types with different capacities to serve 100 customers. The proposed CHFA achieved feasible routing solutions with a total transportation cost of IDR 17.58 million and a computation time of only 30 seconds. These results demonstrate that CHFA can provide fast and efficient solutions for complex routing problems, making it highly applicable in logistics operations that demand quick decision-making and cost efficiency.
Aplikasi Algoritma Hybrid dalam Penentuan Rute Pendistribusian Produk (Studi Kasus: PT. Enseval Putera Megatrading) Eri Wirdianto; Dhina Regenie; Wisnel
Jurnal Optimasi Sistem Industri Vol. 15 No. 2 (2016): Published in November 2016
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.v15.n2.p171-180.2016

Abstract

PT. Enseval Putera Megatrading is a company which operates in general business and distribution of pharmacy products, general needs, cosmetics, foods and hospital equipment. In their current practice, routing in products deliveries, which is limited by time windows, has not considered the utilization of vehicles' maximum loading capacities. Distribution route from a hybrid algorithm using heuristic clustering and Mixed-Integer Linear Programming approach can accommodate such problem with time windows and vehicles' capacities utilization. Based on the comparison between company’s current route and the route from the hybrid algorithm, it can be seen that the hybrid algorithm is able to decrease total distance and total cost of transportation. This new route concerns on vehicles allocation and time windows limit. This new route can minimize the total cost of transportation that company has to pay.
Determination of Optimal Route for Distribution of Rice Food Assistance in City X using the Cuckoo Search Algorithm Wirdianto, Eri; Bintang, Muhamad Gustaffo; Azhari, Farhan
MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Vol 8 No 1 (2026): Motivection : Journal of Mechanical, Electrical and Industrial Engineering
Publisher : Indonesian Mechanical Electrical and Industrial Research Society (IMEIRS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46574/motivection.v8i1.528

Abstract

As distribution requirements become more complex, various VRP variants have been developed to address specific challenges. Among them, the Vehicle Routing Problem with Time Windows (VRPTW) adds the constraint that each customer must be served within a predefined time frame, making the routing process considerably more difficult. In this study, we propose a new approach that uses the Cuckoo Search (CS), a metaheuristic algorithm based on Lévy flights. This combination of Lévy flights and CS is designed to maximize exploration of optimal solutions while allowing dynamic route variations. This study aims to evaluate the effectiveness of this approach in optimizing rice food assistance distribution routes in City X. The exact method yielded a global optimum solution consisting of four routes with a minimum total distance of 222 km, requiring 2 hours 36 minutes 27 seconds of computation. In comparison, the cuckoo search algorithm also produced four routes, with a slightly longer total distance of 244 km but a significantly shorter computation time of 1 minute 39 seconds. This represents a difference of about 22 km (9.91%) from the exact solution, demonstrating that for VRPTW, the cuckoo search algorithm can generate near-optimal results with minimal deviation and substantially reduced computational effort.
Design of Gas Oven Temperature Control System Using PID Method Wisnel; Eri Wirdianto; Prima Fithri
Journal of Creative Power and Ambition (JCPA) Vol. 4 No. 01 (2026): Journal of Creative Power and Ambition (JCPA)
Publisher : CV Edujavare Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70610/jcpa.v4i01.1135

Abstract

This paper presents the design and implementation of an automatic oven for baking marble sponge cake using a PID-based temperature control system. The proposed system regulates oven temperature and air circulation to achieve stable and uniform baking conditions. Temperature control is implemented using a PID algorithm based on feedback from a K-type thermocouple sensor, while air circulation is controlled by a DC blower motor driven through PWM and a BTS7960 driver. The overall system is controlled by an Arduino Uno R3 microcontroller. PID parameters were determined using the Ziegler–Nichols reaction curve method, resulting in ???????? = 16.4, ???????? = 90 s, and ???????? = 22.5 s. Experimental results show that the oven was able to reach and maintain a setpoint temperature of 175 ∘C with acceptable stability during a 28-min baking process. Therefore, the developed system can be considered effective for automatic marble sponge cake baking requiring stable and controlled thermal conditions.
Co-Authors Adi, Alexie Herryandie Bronto Afri Adnan Afrileni, Wirna Afrinaldi, Feri Ahmad Syafruddin Alexie Herryandie Alfadhlani Alfandi, Rahmad Alizar Hasan Ananda, Defri Arri Fatimah Zahra Asmuliardi Muluk Azhari, Farhan Bintang, Muhamad Gustaffo Dalnis, Intan Permata Desto Jumeno Desto Jumeno Dhina Regenie Dhina Regenie Dicky Fatrias Difana Meilani Dina Rahmayanti Elita Amrina Febrian, Muhammad Naufal Felia Devina Amadea Hafizh Ahmad Henmaidi Henmaidi Hilma Raimona Zadry Ikhwan Arief Irfan Nugraha Putra Mukhti Jonrinaldi Kamil, Insannul Keynobi, Fikri Lusi Susanti Meiyola Syaflinda Milana Milana Nilda Tri Putri Prima Fithri Putri Oktaviani reinny patrisina Rika Ampuh Hadiguna Sakilah, Tiva Tara Cantika Taufik Taufik Wisnel Wisnel Wisnel Zidanne, Muhammad