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All Journal AdMathEdu : Jurnal Ilmiah Pendidikan Matematika, Ilmu Matematika dan Matematika Terapan Kubik JISTech (Journal of Islamic Science and Technology) JOURNAL OF SCIENCE AND SOCIAL RESEARCH Saintifik : Jurnal Matematika, Sains, dan Pembelajarannya AL-ULUM: JURNAL SAINS DAN TEKNOLOGI Math Educa Journal Vygotsky: Jurnal Pendidikan Matematika dan Matematika MES: Journal of Mathematics Education and Science Proximal: Jurnal Penelitian Matematika dan Pendidikan Matematika G-Tech : Jurnal Teknologi Terapan INFOKUM Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistika Jurnal IPTEK Bagi Masyarakat Journal of Mathematics and Scientific Computing With Applications Journal of Information Systems and Technology Research Jurnal Bayesian : Jurnal Ilmiah Statistika dan Ekonometrika Jurnal Garuda Pengabdian Kepada Masyarakat
Rina Filia Sari
Universitas Islam Negeri Sumatera Utara
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Public Health Social Sciences Other

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Optimasi Penjadwalan Produksi Menggunakan Metode Palmer pada Mulia Genteng Beton Alfinda Kharisma; Rina Filia Sari; Hendra Cipta
Proximal: Jurnal Penelitian Matematika dan Pendidikan Matematika Vol. 9 No. 1 (2026): Volume 9 Nomor 1 Tahun 2026
Publisher : Universitas Cokroaminoto Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30605/proximal.v9i1.7192

Abstract

Penjadwalan produksi yang optimal sangat penting bagi perusahaan manufaktur untuk menghindari penumpukan barang dan keterlambatan distribusi. Penelitian ini bertujuan mengoptimalkan penjadwalan produksi paving block pada Mulia Genteng Beton menggunakan metode Palmer. Data yang digunakan mencakup waktu proses tiap job, jumlah mesin, serta data permintaan bulan September 2022. Metode penelitian yang digunakan adalah metode kuantitatif dengan pendekatan eksperimen yang bertujuan untuk mengoptimalkan penjadwalan produksi pada sistem flowshop. Adapun tahapan dalam penelitian ini meliputi uji kelayakan data, perhitungan waktu baku, perhitungan dengan menggunakan metode Palmer serta perhitungan makespan. Hasil penelitian menunjukkan urutan job optimal adalah J2–J1–J3 dengan makespan sebesar 381.624,66 detik (±106 jam). Hasil ini sama dengan perusahaan namun dengan pendekatan yang lebih sistematis. Penelitian ini berkontribusi dalam memberikan rekomendasi metode penjadwalan sederhana namun efektif pada industri paving block.
Panel Data Regression Modeling of North Sumatra Province's Gross Regional Domestic Product for 2019-2023 Ester Maylani; Rina Filia Sari
Vygotsky: Jurnal Pendidikan Matematika dan Matematika Vol. 7 No. 2 (2025): Vygotsky: Jurnal Pendidikan Matematika dan Matematika
Publisher : Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/voj.v7i2.1279

Abstract

Regional economic growth is influenced by various factors that need to be analyzed accurately to support the formulation of effective policies. This study aims to analyze the influence of economic factors on the Gross Regional Domestic Product (GRDP) in North Sumatra Province. The main issue raised is the need for an appropriate model to understand the relationship between economic variables and GRDP. This study uses panel data from 33 districts/cities during the period 2019–2023 obtained from official sources. Through Chow, Hausman, and Lagrange Multiplier tests, the Fixed Effect model was selected. The results indicate that population size, number of poor people, and Human Development Index (HDI) significantly influence RDP.
MULTIVARIATE SINGULAR SPECTRUM ANALYSIS MODEL IN FORECASTING RED CHILI AND CAYENNE PEPPER PRICES Radita Rahma; Rina Filia Sari; Sajaratud Dur
AL-ULUM: JURNAL SAINS DAN TEKNOLOGI Vol 10 No 1 (2024)
Publisher : UPT Publication and Journal Management, Islamic University of Kalimantan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31602/jst.v10i1.14281

Abstract

North Sumatra is one of the provinces that contributes the most prominent agricultural commodities of red chilies and cayenne peppers in Indonesia. This study aims to determine the outcomes of price forecasts for cayenne and red chilies in the province of North Sumatra. The method used is multivariate singular spectrum analysis. Results were grouped into six groups based on 12 eigenvectors with a forecast length of 9 monthly periods. Further, the level of accuracy was obtained from MAPE for each variable, with the highest MAPE being 30% for the curly red chili, 27.55% for the big red chili, and the lowest at 23.44% for mixed cayenne pepper. So, the price forecast for red chilies and cayenne peppers in North Sumatra Province for October 2023 to June 2024 using the Multivariate Singular Spectrum Analysis model is included in the forecast category with reasonable capabilities.
Optimization of Potato and Carrot Production in Karo District Using the Beale Method riezkyfadhillah riezky; Rina Filia Sari
KUBIK Vol 10 No 1 (2025): KUBIK: Jurnal Publikasi Ilmiah Matematika
Publisher : Department of Mathematics, Faculty of Science and Technology, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/kubik.v10i1.49213

Abstract

This study aims to optimize land allocation for potato and carrot production in Karo Regency, North Sumatra, using a quadratic programming approach using the Beale method. Secondary data from the Karo Regency Agriculture Office for 2018-2024 are used to construct a quadratic objective function using the least squares method. The Beale method is applied iteratively to solve optimization problems with linear constraints. The results show that the optimal land allocation of 0.5382 hectares for carrots and 0.4005 hectares for potatoes provides a maximum yield of 1.6239 tons. These findings demonstrate the effectiveness of the mathematical optimization approach in improving land use efficiency and supporting data driven decision making in the horticultural agricultural sector.
Analisis Hubungan Pertumbuhan UMKM dan Pengangguran di Sumatera Utara Rina Filia Sari; Syech Suhaimi; Widi Ihdina Nabilla; Afnaria; Melinda Aprianingsih
SAINTIFIK Vol 12 No 1 (2026): Saintifik: Jurnal Matematika, Sains, dan Pembelajarannya
Publisher : Universitas Sulawesi Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31605/saintifik.v12i1.642

Abstract

Penelitian menganalisis hubungan antara pertumbuhan UMKM dan penurunan tingkat pengangguran di Sumatera Utara dengan menggunakan model eksponensial dan logistik. Berdasarkan data dari periode 2020 hingga 2023, model eksponensial menunjukkan bahwa jumlah UMKM tumbuh dengan laju rata-rata sebesar 4,96% per tahun. Sementara itu, model logistik yang digunakan untuk memprediksi penurunan pengangguran menunjukkan bahwa UMKM berkontribusi dalam mengurangi Tingkat Pengangguran Terbuka (TPT) sebesar 1,42% per tahun. Hasil analisis korelasi Pearson menunjukkan adanya korelasi negatif yang sangat kuat (-0,87) antara pertumbuhan UMKM dan penurunan pengangguran. Secara keseluruhan, efektivitas UMKM dalam menyerap tenaga kerja tercatat mencapai 75%, khususnya dalam mengurangi pengangguran di kalangan usia muda (15–24 tahun).
Co-Authors Afnaria Afnaria, Afnaria Ahmad Syahrial Pohan Aida Febriana Tanjung Alfinda Kharisma Alya Azhrah Hutagalung Ana Uzla Batubara Anggi Pranata Atika Rahayu Debi Anggitasyah Dedy Juliandri Panjaitan Elma Dwi Ariana Aprilia Zam Ester Maylani Fahira Audri Yunisa Fithria Aidra Marpaung Hani Maulida Hasibuan Heba A. Fayed Hema Pebria Rollingka Hendra Cipta Heni Pujiastuti Ika Silvia Ramadani Melinda Aprianingsih Metrilitna Br Sembiring Muhammad Harits Azhari Mutiah Nasution Nur Lela Paisal Sirait Qonita Putri Andini Radita Rahma Rakhmawati, Fibri Reka Rahmawi riezkyfadhillah riezky Rima Aprilia Rina Widyasari Riri Syafitri Lubis Ruth Mayasari Simanjuntak Sajaratud Dur Siti Handayani Syech Suhaimi Widi Ihdina Nabilla Wilia Husna Yolandini Eka Putri