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All Journal Jurnal Teknoinfo Operations Research: International Conference Series International Journal of Global Operations Research International Journal of Quantitative Research and Modeling Journal Of Human And Education (JAHE)
Subandi, Kotim
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Humanities Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Physics Social Sciences Other

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PROTECTION SECOND LAYER MENGGUNAKAN MULTI FACTOR AUTHENTICATOR UNTUK MEMVERFIKASI KEABSAHAN ACCOUNT EMAIL DI DALAM ACTIVE DIRECTORY Subandi, Kotim; Ahmad, Dinar Munggaran; Sugara, Victor Ilyas; Aryani, Adriana Sari; Hermawan, Hermawan
Jurnal Teknoinfo Vol 18, No 2 (2024): Juli 2024
Publisher : Universitas Teknokrat Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33365/jti.v18i2.4035

Abstract

The problem that often occurs is that many users use unsafe devices to carry out the login process, for example using laptops, mobile phones and other devices in public spaces such as terminals, airport stations, public libraries, cafes and even internet cafes. One of the important steps in the security and authentication process. This verification ensures that the account owner has access to the email address used to register or log in to a service. Multi-Factor Authentication (MFA) is a security method that requires users to provide more than one form of authentication to access a system or application. Research focuses on evaluating the security of MFA, using appropriate metrics (such as authentication success rate, successful attack rate, or discovered vulnerabilities) to assess the effectiveness of MFA. Implementing MFA on email accounts is not only a wise security measure, but also a recommended practice to protect personal information and reduce online security risks
Modeling Queue Length at The Toll Gate Using Promodel Before and After Ramp-Off Construction Hafizi, Muhamad; Hafiz, Syauqi Abyan; Sugiharto, Bambang; Tosida, Eneng Tita; Bon, Abdul Thalib Bin; Sugara, Victor Ilyas; Subandi, Kotim; Salih, Yasir
International Journal of Quantitative Research and Modeling Vol 6, No 1 (2025)
Publisher : Research Collaboration Community (RCC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijqrm.v6i1.905

Abstract

In everyday life, queues often occur. Waiting at the counter to get train or movie tickets, at the toll gate, at the bank, at the supermarket, and in other situations that we often encounter Queues occur when the need for services exceeds the capacity or capacity of the service facility. As a result, users of the facility cannot get immediate service due to the busyness of the service. The Amplas Toll Gate queue is the object of this research. The Amplas Toll Gate is one of the densest toll gates that is heavily traveled by vehicles both entering and exiting. This makes it often seen a fairly long queue, especially during peak hours in the late afternoon to evening. The Medan City Government built an off ramp at the Amplas flyover in 2016. This off ramp leads directly to the Amplas toll gate. The vehicle arrival rate increases along with the queue length because vehicles can arrive faster to the toll gate. This study aims to calculate the queue length at the Amplas toll gate before and after the construction of the ramp off. Data is obtained by recording the volume of vehicles at the research location. With an average service time of 7 seconds, the queuing method produces a queue length of 11.98 meters, while the results using Pro Model software are 11.98 meters. In addition, the queue length after the construction of the ramp off decreased to 6.67 meters from before the construction of the ramp off. Promodel is a windows-based simulation software used to simulate and analyze a system.
Dynamic Modeling of Catfish Farming Development Using iThink Software Febrian, Muhamad Zidane; Saka, Bima Ariya; Werdaya, Rangga Kusumah Putra Marsha; Tosida, Eneng Tita; Subandi, Kotim; Sugara, Victor Ilyas
Operations Research: International Conference Series Vol. 6 No. 1 (2025): Operations Research International Conference Series (ORICS), March 2025
Publisher : Indonesian Operations Research Association (IORA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47194/orics.v6i1.367

Abstract

This study analyzes the development of catfish farming in the Special Region of Yogyakarta (DIY) using a dynamic systems approach with iThink software. The model evaluates the relationships between local production, demand, external supply, and market prices over a 10-year period. The results indicate that local production can only partially meet demand, leading to a high dependency on external supply, primarily from Boyolali Regency and East Java. Simulations identify optimal strategies to enhance production efficiency, maximize land utilization, and reduce reliance on external supply. Model validation demonstrates that the simulation results align with historical data, making it a reliable tool for supporting sustainable strategic policy planning. This study is expected to provide solutions for food security and strengthen the self-sufficiency of the fisheries sector in DIY.
Dynamic Simulation Model of Garlic Availability in Bali Using iThink Software Hafizi, Muhamad; Hafiz, Syauqi Abyan; Sugiharto, Bambang; Tosida, Eneng Tita; Subandi, Kotim; Sugara, Victor Ilyas
Operations Research: International Conference Series Vol. 6 No. 1 (2025): Operations Research International Conference Series (ORICS), March 2025
Publisher : Indonesian Operations Research Association (IORA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47194/orics.v6i1.368

Abstract

Fluctuations in local production, increasing demand, and dependence on garlic supplies from outside the island make it difficult for Bali Province to maintain a stable garlic supply. iThink software is used to model the dynamic garlic availability system in this study. This simulation method involves creating a Causal Loop Diagram (CLD), creating a mathematical model based on differential equations, and conducting table and graphical analysis of the simulation results. The simulation results show that the linear increase in garlic demand of 6,289.08 tons per year can be offset by local production increasing to 31,071.73 in 2024 and an off-island supply of 4,176 tons per year. The projection of garlic availability until 2024 is 122,895.71 tons. The results show that maintaining a stable supply of off-island garlic is the main way to ensure sustainable garlic availability in Bali.
Prediction of Chicken Meat Availability in Cilegon City Using iThink Dynamic Simulation Model Firdaus, Muhamad Haikal; Sauri, Ahmad Sopyan; Turrohman, Syaifa; Tosida, Eneng Tita; Subandi, Kotim; Sugara, Victor Ilyas
Operations Research: International Conference Series Vol. 6 No. 1 (2025): Operations Research International Conference Series (ORICS), March 2025
Publisher : Indonesian Operations Research Association (IORA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47194/orics.v6i1.369

Abstract

The availability of chicken meat is a crucial factor in maintaining price stability and food security in Cilegon City. The increasing demand, influenced by population growth and consumption patterns, must be balanced with optimal supply from farmers and distributors. This study aims to predict the availability of chicken meat using a dynamic simulation model based on iThink. This model is built with a stocks and flows approach and causal loop diagrams to understand the dynamics of the system involving production, import, distribution, consumption, and external factors such as government policies and weather conditions. The simulation results show that the balance of supply and demand is greatly influenced by the level of local production, per capita consumption levels, and import policies. The simulation scenario also reveals that increasing production efficiency and optimizing distribution can increase the availability of chicken meat in the market by 15-20% in the next five years. This model is expected to be a tool for stakeholders in formulating more adaptive policies to maintain the stability of supply and prices of chicken meat in Cilegon City.
Dynamic Simulation of Doctor Needs in East Java Province By Using iThink Zabrina, Siti; Nasyifa, Hesti; Febryan, Calvin; Tosida, Tita; Subandi, Kotim; Sugara, Victor Ilyas
Operations Research: International Conference Series Vol. 6 No. 1 (2025): Operations Research International Conference Series (ORICS), March 2025
Publisher : Indonesian Operations Research Association (IORA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47194/orics.v6i1.370

Abstract

This study compares the calculation of doctor needs in East Java Province using two dynamic simulations, namely iThink and Python. The purpose of this study is to identify differences in results between the two simulation platforms in estimating the need and availability of doctors based on population growth and the number of medical graduates. The methodology used involves modeling population dynamics and the flow of active doctors by considering the inflow of medical students and the WHO ratio. The results of the iThink simulation show an increase in the number of active doctors from 42,000 to 63,793 in 10 years, approaching the ideal WHO ratio, while the Python simulation shows a significant gap between the need and the number of doctors, with the need reaching 257,680 doctors in 2029, but the number of active doctors only reaching 21,686. This difference is due to variations in the methodology and approach of each platform. The conclusion of this study shows the importance of policy interventions to meet the need for doctors in the future and reduce the gap between the need and availability of doctors.
Application of Registration Queue System Simulation with Multi Chanel-Multi Phase Method at Royal Prima General Hospital with Promodel Falleryan, Muhammad; P.S, Axel Juanito; Tosida, Eneng Tita; Sugara, Victor Ilyas; Nurcahya, Dimas; Subandi, Kotim
International Journal of Global Operations Research Vol. 6 No. 2 (2025): International Journal of Global Operations Research (IJGOR), May 2025
Publisher : iora

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47194/ijgor.v6i2.374

Abstract

Royal Prima General Hospital often faces the problem of patient accumulation, especially at the initial registration stage, which results in increased waiting time and decreased service quality. To overcome this problem, this study implemented a multi-channel multi-phase queuing system using Promodel simulation software. This method allows the distribution of patients into multiple lanes and service stages, thereby reducing congestion and shortening waiting times. The research data was taken from a simulation that included 500 patients in the first phase (registration) and 100 patients each in the second phase (internal medicine polyclinic) and third phase (neurology polyclinic). The simulation results show that the multi-channel multi-phase queuing system is able to handle the flow of patients effectively with an average waiting time of 1.75 minutes before receiving service. Facility utilisation rates show that the internal medicine and neurology polyclinic areas operate almost at full capacity (above 90%), while the admission area has an underutilised capacity (31.8%).
Dynamic System Simulation Design Projected Growth and Shrinkage of to Food Production in Sukabumi Rezaghani; Baskoro, Arif Dwi; Aprido, Eka; Tosida, Eneng Tita; Subandi, Kotim; Sugara, Victor Ilyas
International Journal of Global Operations Research Vol. 6 No. 2 (2025): International Journal of Global Operations Research (IJGOR), May 2025
Publisher : iora

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47194/ijgor.v6i2.375

Abstract

A rapid increase in population along with limited agricultural land can lead to shrinkage of paddy fields, which risks threatening food production and the sustainability of the agricultural sector in the region. This research uses a simulation modeling method with a dynamic system approach. The simulation model was designed based on data related to population growth and the decline in rice field area, as well as other factors that influence it. The dynamic system approach is often applied to analyze systems with many interdependent components. The iteration process in this system shows how changes in one element can affect other elements in the future through complex cause-and-effect relationships. Increased demand for land has contributed to the shrinkage of paddy fields, which in turn has reduced food production. In Sukabumi district, population growth increases land demand, thus accelerating the shrinkage of paddy fields and reducing food production in the region. Projections show that the population of Sukabumi District will grow by around 29% per year, reflecting the huge challenge of providing adequate services and infrastructure to the population.
The Application of Dynamic Simulation for Determining Competitive Sales Strategies of Cassava Chips Using iThink Falleryan, Muhammad; Juanito, Axel; Nurcahya, Dimas; Tosida, Eneng Tita; Subandi, Kotim; Sugara, Victor Ilyas
International Journal of Global Operations Research Vol. 6 No. 2 (2025): International Journal of Global Operations Research (IJGOR), May 2025
Publisher : iora

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47194/ijgor.v6i2.377

Abstract

This study aims to determine sales strategies for cassava chips through a dynamic simulation approach using iThink software. The simulation is used to model the factors influencing sales performance, such as fluctuations in raw material prices, operational costs, and market demand patterns. By employing a CLD (Causal Loop Diagram) model and dynamic simulation, this research evaluates various strategies, including product diversification, digital promotion, and distribution efficiency. The simulation results indicate that implementing strategies such as flavor variant diversification and increased promotion through social media can significantly improve sales and profits. Validation was carried out through sensitivity testing on cost and sales parameter changes, demonstrating that dynamic simulation can be an effective tool to support data-driven strategic decision-making
Penilaian Harapan dan Kepuasan Pelanggan Lembaga Penilaian Kesesuaian menggunakan MetodaImportance Performance Analysis Wiharthiko, Fajar Deli; Aryani, Adriana Sari; Subandi, Kotim; Tsaniyah, Legis; Sugara, Victor Ilyas; Hermawan, Hermawan
Journal Of Human And Education (JAHE) Vol. 4 No. 1 (2024): Journal Of Human And Education (JAHE)
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jh.v4i1.560

Abstract

Sertifikasi merupakan bisnis kepercayaan sehingga hubungan antara pemberi jasa yakni Lembaga Penialaian Kesesuaian atau LPK dengan pelanggannya menjadi sangat istimewa. Kepuasan pelanggan adalah salah satu faktor penting yang terus dijaga dan dievaluasi dari waktu ke waktu. Perusahaan mitra Registra Indonesia adalah salah satu LPK dengan skala usaha kecil menengah memiliki komitmen untuk memelihara kepuasan pelanggannya, sehingga bersama dengan tim pengabdian masyarakat dari Universitas Pakuan telah membangun suatu sistem penilaian. Sistem penilaian kepuasan pelanggan dibangun berbasis sistem informasi yang terintegrasi dengan web sites Registra Indonesia. Sistem penilaian kepuasan pelanggan LPK Regista Indonesia telah diuji coba pada semester II tahun 2023, melalui pengumpulan pendapat dari 22 pelanggannya melalui GForm. Hasil analisis menggunakan metoda Importance Performance Analysis menunjukkan bahwa tingkat kepuasan pelanggan rata-rata 90.77% dari harapannya. Sehingga Wilcoxon Signed-Rank Test memastikan bahwa kepuasan pelanggan telah sesuai dengan harapannya.Seluruh factor penentu kepuasan pelanggan yang dievaluasi pada Semester II Tahun 2023 menunjukkan tingkat kepuasan Sangat Baik. Sementara evaluasi yang dilakukan berdasarkan jenis produk layanan menunjukkan posisi juga Sangat Baik, kecuali sertifikasi HACCP yang satu tingkat di bawahnya yakni Baik.
Co-Authors Adriana Sari Aryani Ahmad, Dinar Munggaran Aprido, Eka Bambang Sugiharto Baskoro, Arif Dwi Bon, Abdul Thalib Bin Eneng Tita Tosida Falleryan, Muhammad Febrian, Muhamad Zidane Febryan, Calvin Firdaus, Muhamad Haikal Hafiz, Syauqi Abyan Hafizi, Muhamad Hermawan Hermawan Juanito, Axel Legis Tsaniyah, Legis Nasyifa, Hesti Nurcahya, Dimas P.S, Axel Juanito Rezaghani Saka, Bima Ariya Salih, Yasir Sauri, Ahmad Sopyan Sugara, Victor Ilyas Tosida, Tita Turrohman, Syaifa Werdaya, Rangga Kusumah Putra Marsha Wiharthiko, Fajar Deli Zabrina, Siti