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All Journal Wahana Matematika dan Sains Matematika: Jurnal Teori dan Terapan CAUCHY: Jurnal Matematika Murni dan Aplikasi Jurnal Matematika & Sains SITEKIN: Jurnal Sains, Teknologi dan Industri Kubik Jurnal Fourier Jurnal Sains Matematika dan Statistika NUMERICAL (Jurnal Matematika dan Pendidikan Matematika) Journal of Energy, Mechanical, Material and Manufacturing Engineering Desimal: Jurnal Matematika Seminar Nasional Teknologi Informasi Komunikasi dan Industri Zeta - Math Journal Math Educa Journal Square : Journal of Mathematics and Mathematics Education Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistika KUBIK: Jurnal Publikasi Ilmiah Matematika Euler : Jurnal Ilmiah Matematika, Sains dan Teknologi Mathematics and Applications (MAp) Journal Journal of Fundamental Mathematics and Applications (JFMA) Makara Journal of Science
Sri Basriati
Fakultas Sains Dan Teknologi Universitas Islam Negeri (UIN) Sultan Syarif Kasim Riau
Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Social Sciences Other

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Penyelesaian Metode Round Off dan Metode Cutting Plane dalam Optimalisasi Produksi Anyaman Rotan UD. Kirana Safitri, Elfira; Basriati, Sri; Mexdika, Raja Putra; Soleh, Mohammad
Square : Journal of Mathematics and Mathematics Education Vol 6, No 1 (2024)
Publisher : UIN Walisongo Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21580/square.2024.6.1.20402

Abstract

UD Kirana is a trading business that produces rattan weaving in Rumbai district which consists of 5 types of products produced, namely guest chairs, terrace chairs, tender chairs, serving hoods and baskets. In the rattan woven production process, UD Kirana cannot predict how many items can be produced each week so that maximum profits have not been achieved.This research aims to find out how goods can be produced every week in order to get maximum profits.The methods used are the Round Off method and the Cutting Plane method. Based on the research result, UD Kirana produced 10 tender chairs, 7 serving hoods and 21 baskets with a profit of Rp. 6.060.000. The Round Off method is more efficient than the Cutting Plane method, this can be seen from the addition of constraints, namely the Round Off method adds two constraints and the Cutting Plane method adds three constraints or gomory constraints.
Optimasi Biaya Pemupukan Tanaman Kelapa Sawit Menggunakan Metode Branch And Cut Safitri, Elfira -; Sri Basriati; Mohammad Soleh; Nikmatul Aufa
Wahana Matematika dan Sains: Jurnal Matematika, Sains, dan Pembelajarannya Vol. 18 No. 1 (2024): April 2024
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/wms.v18i1.52154

Abstract

Kelapa sawit merupakan tanaman yang menghasilkan produk utama yaitu minyak sawit (CPO) dan minyak inti sawit (KPO) yang memiliki nilai ekonomis tinggi. Untuk menunjang pertumbuhan tanaman kelapa sawit, maka dibutuhkan pupuk agar kebutuhan unsur hara kelapa sawit tercukupi. Tetapi umumnya para petani kurang memperhatikan penggunaan pupuk sehingga menyebabkan kurang optimalnya pemberian jumlah pupuk dan pemborosan biaya yang dikeluarkan untuk pemupukan. Penelitian ini bertujuan untuk mendapatkan solusi optimal dalam menentukan jumlah pupuk agar mendapatkan biaya yang efisien pada perkebunan kelapa sawit di Desa Siabu, Kabupaten Kampar dengan metode yang digunakan adalah metode Branch and Cut yang merupakan penggabungan antara metode Branch and Bound dan metode Cutting Plane sebagai pendekatan model Integer Programming. Berdasarkan hasil penelitian diperoleh solusi optimal yaitu pemilik perkebunan harus menyediakan pupuk jenis Urea sebanyak 9 karung, pupuk jenis TSP sebanyak 6 karung, pupuk jenis KCL sebanyak 9 karung, pupuk Dolomite sebanyak 8 karung, dan tidak perlu menyediakan pupuk jenis NPK Yaramila Winner agar mendapat biaya minimum sebesar Rp. 11.460.000 untuk setiap hektarnya dalam satu tahun. Kata kunci: Integer Programming, kelapa sawit, metode branch and cut, pupuk
Optimasi Biaya Pemupukan Tanaman Padi pada Kelompok Tani Rambahan Sakato, Desa Nyiur Melambai Pelangai menggunakan Metode Kuhn Tucker Safitri, Elfira; Basriati, Sri; Soleh, Mohammad; Yulanda, Rahmi
KUBIK Vol 8, No 1 (2023): KUBIK: Jurnal Publikasi Ilmiah Matematika
Publisher : Jurusan Matematika, Fakultas Sains dan Teknologi, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/kubik.v8i1.18261

Abstract

The Rambahan Sakato Farmer Group, Nyiur Melambai Pelangai Village, West Sumatra is a farmer groups that produces various types of food, one of which is rice plants. One of the factors that support plants to grow optimally is the availabity of nutrients in sufficient quantities in the soil. There are four types of fertilizers used in the fertilization of rice plants, namely SP-36 fertilizer, Urea fertilizer, Phonska fertilizer and KCL fertilizer. This study aims to optimal solution in determining in amount of fertilizer in rice plants with the minimum cost using the Kuhn Tucker Method. The method used in this research is the Kuhn Tucker method. The solution to the Kuhn-Tucker method is the same as the Lagrange method, namely calculating the value (x, λ, S) and calculating the value of f (x). The process of finding values (x, λ, S) uses matrix multiplication. Based on the research results, it was found that the Rambahan Sakato farmer group needed to provide 1 sack of SP-36 fertilizer, 3 sacks of urea fertilizer, 16 sacks of Phonska fertilizer and did not need to provide KCL fertilizer at a minimum cost of Rp. 2,710,000.
Aplikasi Metode Weighted Moving Average pada Harga Beras Bulanan di Pasar Kota Pekanbaru Basriati, Sri; Safitri, Elfira; Andini, Chania Tri; Nuraisyah, Puteri
Seminar Nasional Teknologi Informasi Komunikasi dan Industri 2024: SNTIKI 16
Publisher : UIN Sultan Syarif Kasim Riau

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

Abstract

AbstrakHarga beras di pasar kota Pekanbaru cenderung mengalami kenaikan, sehingga berdampak ke masyarakat dimana garis kemiskinan semakin meningkat dan kualitas hidup masyarakat menjadi buruk. Dalam hal tersebut, peneliti bertujuan untuk merancang dan membangun aplikasi yang dapat membantu dalam memprediksi harga beras untuk bulan berikutnya. Dalam penelitian ini akan dilakukan pengaplikasikan metode Weighted Moving Average pada harga beras bulanan di pasar kota Pekanbaru karena menghasilkan nilai error nya kecil, semakin kecil nilai error yang dihasilkan maka metode tersebut semakin tepat digunakan. Hasil peramalan (forecasting) menggunakan merode WMA didapatkan hasil WMA bulan April yaitu sebanyak 15460 data peramalan, yang mana data ini hampir sama dengan data asli yaitu sebanyak 15350  Rp/Kg. Serta jumlah MFE -120, MAD 120, MSE 14400 dan MAPE sebanyak 0,78. Sehingga didapat prediksi harga Beras bulanan di Pasar Kota Pekanbaru Tahun 2024 yang mana data yang dihasilkan mengalami harga yang tidak stabil, namun pada saat bulan agustus hingga bulan desember prediksi harga beras tetap yaitu sebesar 16682.4 Rp/Kg. Kata kunci: Beras, Prediksi, Weighted Moving Average
Peramalan Hasil Panen Jagung di Provinsi Riau menggunakan Metode Single Exponential Smoothing Safitri, Elfira; Rahma, Adlul Finy; Basriati, Sri
Seminar Nasional Teknologi Informasi Komunikasi dan Industri 2024: SNTIKI 16
Publisher : UIN Sultan Syarif Kasim Riau

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

Abstract

This study discusses the forecasting of corn harvest in Riau Province. One of Indonesia's agricultural food commodities that has potential commodities is corn plants. Corn is one of the world's most important sources of food carbohydrates besides wheat and rice. Data from the Central Statistics Agency (BPS) of Riau Province in 2020, corn production was 30,884 tons.  This figure is much more than in 2021 where the production only reached 17,218 tons. Due to the decline in production, it is necessary to forecast production results for 2024. The purpose of the study is to find out the prediction of the number of corn harvests in 2024. The method used in this study is the Single Exponential Smoothing Method. Based on the results of the study, the total corn harvest in 2024 was 8,511.33 tons and MAPE was 0.58% with α = 0.9.
PENERAPAN METODE ECONOMIC ORDER INTERVAL (EOI) DAN METODE PENGALI LAGRANGE DALAM PENGENDALIAN PERSEDIAAN BAHAN BAKU KERIPIK BAWANG Rahmi, Nafia; Safitri, Elfira; Basriati, Sri; Sukmawati, Sri
Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistika Vol. 6 No. 1 (2025): Jurnal Lebesgue : Jurnal Ilmiah Pendidikan Matematika, Matematika dan Statistik
Publisher : LPPM Universitas Bina Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46306/lb.v6i1.725

Abstract

A common problem often faced by companie is the instability if the supply of raw materials needed by the company. Likewise, the Nadin’s Onion Chips Business has not implemented a stable raw materials inventory control system. The aim of this research is to control raw material inventory to determine the optimal inventory cost value. The methods used are Economic order Interval (EOI) and Lagrange Multplier. Based on the results, the cost of supplies for tapioca flour was IDR 429.204, wheat flour IDR 429.204, eggs IDR 151.514, garlic IDR 151.578, shallots IDR 172.706, celery IDR 107.301, vegetable oil IDR 239.918 , salt amounting to Rp. 177.822 and flavorings amounting to IDR. 176.394. Meanwhile, using the Lagrange Multiplier method produces inventory costs for tapioca flour of IDR 435.081, wheat flour of IDR 454.352, eggs of IDR 193.917, garlic of IDR 156.468, shallots of IDR 183.314, celery of IDR 113.702, oil vegetables amounting to IDR 243.355, salt amounting to IDR 183.053 and flavorings amounting to IDR 179.815. From the calculation results it can be concluded that the EOI method is more optimal than the Lagrange Multiplier method because EOI has minimum inventory costs.
Steam requirements and mass balance in digesters and screw presses at palm oil mill Zulfatri Aini; Tengku, Tengku Reza Suka Alaqsa; Sri Basriati
Journal of Energy, Mechanical, Material, and Manufacturing Engineering Vol. 9 No. 2 (2024)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v9i2.37043

Abstract

Fresh Fruit Bunches (FFB) are the primary component in Crude Palm Oil (CPO) production. Palm oil mills face challenges in optimizing CPO yield, particularly in reducing oil losses during processing, which affects efficiency and profitability. The pressing station, including the digester and screw press, plays an important role in oil extraction. The digester uses steam to heat and soften the fruit for better oil release, while the screw press performs the mechanical extraction of oil. Insufficient steam can hinder oil separation, leading to increased losses. This research aimed to analyze steam requirements for the digester and evaluate the mass balance of the screw press. Using energy and mass balance methods, the optimal steam requirement was 359,870 kg/hour with a mass balance error of 6.58%. Corrective actions in steam valve settings reduced oil losses to 1.57%, which improved processing efficiency and product quality.
Analisis Tingkat Popularitas Produk Penjualan Kue Menggunakan Metode Analytical Hierarchy Process Spastika, Galuh Mreta; Safitri, Elfira; Basriati, Sri; Soleh, Mohammad
Euler : Jurnal Ilmiah Matematika, Sains dan Teknologi Volume 13 Issue 1 April 2025
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/euler.v13i1.30894

Abstract

This research explains the decision-making system in determining problems using the Dapoer Zahra case study in Pekanbaru. This research aims to measure the popularity of cake products at Dapoer Zahra Pekanbaru using the Analytical Hierarchy Process (AHP) method, as well as providing product recommendations that are worthy of prioritization based on the analysis results. AHP works by comparing each criterion in pairs to find out which one is more important. After the weight of each criterion is determined, cake products are assessed based on these criteria. The final result is a product ranking from most to least popular, which can be used as a basis for decision making in business management. Based on the research results, it was found that taste is the most important criterion in the level of popularity of cake sales products at Dapoer Zahra at 42.98%, price at 40.99% and finally the appearance criterion at 16.04%. The Marble Cake alternative has the highest level of product popularity with 28.50%, Chiffon Cake with 19.56%, Baked Brownies with 17.34%, Tape Cake with 13.93%, Roll Cake with 10.38%, and the last one is Bolu Banana with 10.29%. The results of the analysis show that Marmer Cake has the highest priority level compared to other types of cakes based on the criteria of price, taste, and appearance. This shows that Marmer Cake is considered superior in terms of taste that consumers like, competitive prices, and attractive product appearance. These advantages can be used as a reference by Dapoer Zahra to strengthen business strategies, such as increasing Marmer Cake production capacity, expanding flavor variations, or conducting special promotions for this product.
Application of Economic Production Quantity (EPQ) Method and Just in Time Method (JIT) in Bread Raw Material Inventory Control Kisty, Teshi Amelia Hakilla; Safitri, Elfira; Basriati, Sri; Soleh, Mohammad
Zeta - Math Journal Vol 10 No 1 (2025): May
Publisher : Universitas Islam Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31102/zeta.2025.10.1.30-38

Abstract

Retno bakery Bread Shop is one of the shops that produces various types of bread. This bakery has not used a inventory control system in the production process so it cannot meet customer needs. For this reason, Retno Bkery Bakery needs to control inventory so that the company's performance and profits are more optimal. This study discusses the control of the inventory of each bread raw material such as flour, sugar, milk, yeast, salt, butter and eggs. The purpose of this study is to obtain the results of the total cost of bread raw material inventory using the Economic Production Quantity (EPQ) method and the Just in Time (JIT) method as well as the comparison of the two methods used. The methods used are the Economic Production Quantity (EPQ) and Just in Time (JIT) methods. Based on the results of the study, the percentage difference in cost for each raw material was obtained using the Economic Production Quantity (EPQ) method and the Just in Time (JIT) method, namely for flour raw materials of 42.05%, sugar 47.31%, milk 51.63%, yeast 51.83%, salt 47.65%, butter 51.38% and eggs 51%. Thus, the Just in Time (JIT) method results in a smaller total cost than the Economic Production Quantity (EPQ) method.
Optimization of distribution routes in resolving traveling salesman problems using the tabu search algorithm (case study: CV. Bintang anugerah sukses pekanbaru) Basriati, Sri; Safitri, Elfira; Anggraini, Resi
Desimal: Jurnal Matematika Vol. 4 No. 3 (2021): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v4i3.9811

Abstract

CV. Bintang Anugerah Sukses is a company engaged in the distribution of product PT. Belfoods Indonesia. Distribution of frozen goods distributes to 12 customer agencies using one vehicle. The route distribution is determined based on the experience and subjective decisions of a salesman in charge of distributing goods. The problem will be solved using the Travelling Salesman Problem (TSP) approach, so the best route for distributing goods can be obtained that can minimum mileage and time. One of the methods applied to the traveling salesman problem is the Tabu Search algorithm. Tabu Search is one of the metaheuristic methods with the process of searching moving from one solution to the next. The algorithm uses a taboo list to store a set of solutions that have just been evaluated, the result will be adjusted first to the contents of the taboo list to see whether the solution already exists or not. If the solution already exists then the solution will not be evaluated. The calculation results obtained a minimum mileage of 53.6 km and a minimum of time 305 minutes or 5 hours 5 minutes.
Co-Authors -, Yuhandi - A Martino Ade Novia Rahma Afri Melda ahmad faizal Alfaizan Darman Alfitra Martino Amelia Zahara Andini, Chania Tri Anggraini, Resi Ayu - Octariana Ayu Lestari Clara Ramadhania Corry Corazon Marzuki Debby Cahyani Dewi Sartika Dian Mursyitah Dina Aziza Elfira Safitri Elvina Andiani Ervi Helen Sukma Eva Santi Fitri Aryani Habibis Saleh Hashim, Ishak Hasyratul Najmi Ishak Hashim Ishak Hashim Jumiyatun, Jumiyatun Khotimah Khotimah Kisty, Teshi Amelia Hakilla Latifah Hanum Meli Ermanita Mexdika, Raja Putra Mohammad - Soleh Mohammad Soleh Mohammad Soleh Mohammad Soleh Muhammad Rizki muhammad soleh muhammad soleh Mulyani, Septia Nikmatul Aufa Nilwan Andiraja Nilwan Andiraja Nilwan Andiraja Novi Andriani, Novi Nur Azizah Br Barus Nur Ulfa Nuraisyah, Puteri Nurul Izzah Nusantoro, Dinda Kurniyawan Oktavia, Dhea Rizki Putri Ayu Lestari Rahma, Adlul Finy Rahmadeni Rahmadeni Rahmawati Rahmi Yatul Husna M Rahmi, Nafia Resi Anggraini Resti Molina Resti Riafani Retno Ayu Puji Lestari Rini Eka Putri Rini Erawati Rio Sunarya Riska Armeliza Riska Wulandari Safitri, Elfira - Sari, Kiki Indah She Arssy Yesti Soleh, Mohammad - Spastika, Galuh Mreta Sri Sukmawati Sri Wahyuni Syafrika Yuliarti Tengku, Tengku Reza Suka Alaqsa Wazna Ulya Wina Yustari Winda Widiarti Yuhandi - - Yulanda, Rahmi Yuslenita Muda Zukrianto, Zukrianto Zulfatri Aini