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All Journal Griya Journal of Mathematics Education and Application
Julius Zendrato
Universitas Negeri Manado
Education Mathematics

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Optimalisasi Produksi Usaha Kuliner: Pendekatan Linear Programming Pada Rumah Makan Jawa Lumintu Christari Palit; Agresia Sabubun; Achwan Zalalludin; David Kapele; Dyrel Kusnadi; Julius Zendrato; Samuel Bisuan
Griya Journal of Mathematics Education and Application Vol. 5 No. 4 (2025): Desember 2025
Publisher : Pendidikan Matematika FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/griya.v5i4.992

Abstract

Penelitian ini bertujuan untuk menentukan kombinasi produksi makanan yang paling optimal pada Rumah Makan Jawa Lumintu agar keuntungan harian dapat dimaksimalkan. Permasalahan diselesaikan menggunakan metode Simpleks dalam model program linear dengan mempertimbangkan keterbatasan bahan baku seperti ayam, lalapan, bumbu nasi goreng, mie, serta berbagai jenis bakso. Data diperoleh melalui wawancara dan observasi langsung terhadap pemilik usaha. Hasil penelitian menunjukkan bahwa kombinasi produksi optimal terdiri atas 15 porsi nasi goreng, 105 porsi ayam lalapan, 85 porsi bakso biasa, 30 porsi bakso tenes, dan 30 porsi bakso urat. Kombinasi tersebut menghasilkan keuntungan maksimum sebesar Rp 5.310.000 per hari. Analisis kendala menunjukkan bahwa beberapa bahan baku menjadi pembatas utama dalam proses produksi, terutama bumbu nasi goreng, ayam, bakso tenes, dan bakso urat yang habis digunakan pada solusi optimal. Penelitian ini menyimpulkan bahwa metode Simpleks efektif digunakan untuk perencanaan produksi makanan dan dapat menjadi dasar bagi pengambilan keputusan operasional yang lebih efisien.
Modeling Online Loan Risk Dynamics with SEIQRL, Regulation, and Financial Literacy Analysis in Indonesia Christari Lois Palit; Agresia Servina Sabubun; Dyrel Samuel Kusnadi; Julius Zendrato; Mikha Rajagukguk; Tessy Angraini Mokodanga
Griya Journal of Mathematics Education and Application Vol. 6 No. 2 (2026): Juni 2026
Publisher : Pendidikan Matematika FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/griya.v6i2.1175

Abstract

This study examines the dynamics of risky online lending behavior in Indonesia using the SEIQRL mathematical model. The model extends the SEIR approach by adding Quarantined (Q) and Literate (L) compartments to represent regulatory intervention and financial literacy. This study aims to construct the SEIQRL model, analyze the risk-free equilibrium point, calculate the basic reproduction number (R₀), and evaluate the effects of regulation and financial literacy on the spread of risky online lending behavior. The method uses a quantitative approach based on mathematical modeling and numerical simulation with Wolfram Mathematica. The results show that the baseline scenario produces an R₀ value of 6.1538, indicating that risky online lending behavior can spread strongly within the population. Strong regulation and strong literacy scenarios reduce the risk, but they do not fully control its spread. The combined regulation and literacy scenario produces an R₀ value of 0.8696, meaning the risk can be controlled because R₀ < 1. These findings show that controlling risky online lending cannot rely only on access restrictions or service blocking. Early financial literacy must also serve as a preventive strategy. The SEIQRL model can support policy analysis for controlling online lending risks in Indonesia.
Co-Authors Achwan Zalalludin Agresia Sabubun Agresia Servina Sabubun Christari Lois Palit Christari Palit David Kapele Dyrel Kusnadi Dyrel Samuel Kusnadi Mikha Rajagukguk Samuel Bisuan Tessy Angraini Mokodanga