Article Per Year (5 Year)
p-Index From 2020 - 2025
8.539
P-Index
This Author published in this journals
All Journal Wahana Matematika dan Sains Matematika: Jurnal Teori dan Terapan ELKHA : Jurnal Teknik Elektro JURNAL DERIVAT: JURNAL MATEMATIKA DAN PENDIDIKAN MATEMATIKA SITEKIN: Jurnal Sains, Teknologi dan Industri Kubik Jurnal Fourier Jurnal Sains Matematika dan Statistika NUMERICAL (Jurnal Matematika dan Pendidikan Matematika) Desimal: Jurnal Matematika Seminar Nasional Teknologi Informasi Komunikasi dan Industri BAREKENG: Jurnal Ilmu Matematika dan Terapan Zeta - Math Journal Math Educa Journal Square : Journal of Mathematics and Mathematics Education InPrime: Indonesian Journal Of Pure And Applied Mathematics 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) Lattice Journal : Journal of Mathematics Education and Applied Indonesian Council of Premier Statistical Science Jurnal Ecotipe (Electronic, Control, Telecommunication, Information, and Power Engineering)
Elfira Safitri
Universitas Islam Negeri Sultan Syarif Kasim Riau
Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Physics Public Health Social Sciences Transportation Other

Published : 67 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 67 Documents
Search

 3   4   5   6   7 
PENERAPAN METODE REDUKSI VARIABEL DALAM PENGOTIMALAN PENDAPATAN MINIMUM HASIL PRODUKSI BINGKAI FOTO Safitri, Elfira; Basriati, Sri; Oktavia, Dhea Rizki; Soleh, Mohammad
MAp (Mathematics and Applications) Journal Vol 6, No 1 (2024)
Publisher : Universitas Islam Negeri Imam Bonjol Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15548/map.v6i1.7610

Abstract

Production is an activity that produces an object so that it is more useful in meeting needs. One shop that produces photo frame of various sizes is Terminal Photo Giant. The aim of this research is to determine the minimum income per day from photo frame production using the variable reduction method. The method used in this research is the variable reduction method. The variable reduction method produces an optimal solution with all decision variables in the form of integers without having to branch or add gomory constraints. Based on the result of research using the variable reduction method, Giant Photo Terminal produces a minimum of 4 units of 16 R size photo frames and a minimum of 3 units of 18 R size photo frames every day with a minimum daily income of IDR. 570.000.
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 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.
OPTIMASI PRODUKSI CRUDE PALM OIL (CPO) DAN PALM KERNEL MENGGUNAKAN METODE GOAL PROGRAMMING PADA PKS PTPN 3 KEBUN TORGAMBA Safitri, Elfira; Lestari, Winda Ayu
MAp (Mathematics and Applications) Journal Vol 6, No 2 (2024)
Publisher : Universitas Islam Negeri Imam Bonjol Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15548/map.v6i2.9862

Abstract

Artikel ini membahas tentang produksi Crude Palm Oil (CPO)dan Palm Kernel. Permasalahan yang sering terjadi di perusahaan adalah belum optimalnya hasil produksi Crude Palm Oil (CPO) dan Palm Kernel. Salah satu yang terjadi pada Pabrik Kelapa Sawit (PKS) PTPN 3 Kebun Torgamba. Untuk pengambilan keputusan perusahaan dihadapkan dengan beberapa tujuan yaitu memaksimumkan target produksi CPO, memaksimumkan target produksi kernel, memaksimumkan pengolahan Tandan Buah Segar (TBS) menjadi Crude Palm Oil (CPO) dan memaksimumkan pengolahan Tandan Buah Segar (TBS)  menjadi Palm Kernel. Adapun tujuan dari penelitian adalah untuk mengetahui optimasi hasil produksi Crude Palm Oil (CPO) dan Palm Kernel pada PKS PTPN 3 Kebun Torgamba menggunakan metode Goal Prorgamming. Adapun metode yang digunakan pada penelitian ini yaitu metode Goal Programming dengan pengolahan data dengan bantuan Sotware LINGO. Berdasarkan hasil penelitian diperoleh hasil produksi Crude Palm Oil (CPO) bulan Januari sampai Desember masing-masing sebesar X1Jan = 3339,894; X1Feb = 2855,776; X1Mar = 3109,063; X1Apr = 3956,287; X1Mei = 4067,840; X1Jun = 3855,665; X1Jul = 4732,602; X1Agus = 4736,529; X1Sept = 5809,200; X1Okt = 3706,200; X1Nov = 4656,870; X1Des = 4580,423. Sedangkan hasil produksi Kernel bulan Januari sampai Desember masing-masing sebesar X2Jan = 544,400; X2Feb = 419,558; X2Mar = 440,913; X2Apr = 599,437; X2Mei = 629,507; X2Jun = 591,096; X2Jul = 4732,602; X2Agus = 781,507; X2Sept = 973,041; X2Okt = 654,762; X2Nov = 862,310; X2Des = 863,782.
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.
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.
Rainfall Forecasting in the City of Pekanbaru Using the Exponential Smoothing Method Rahmadeni, Rahmadeni; Desasri, Rifa; Safitri, Elfira
Indonesian Council of Premier Statistical Science Vol 4, No 1 (2025): February 2025
Publisher : Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24014/icopss.v4i1.37475

Abstract

 Rainfall is one of the main components in the climate system that has a major influence on various sectors, such as agriculture, transportation, and disaster management. The city of Pekanbaru in Riau Province has tropical climate characteristics with varying levels of rainfall throughout the year. Therefore, a forecasting method is needed that is able to accurately predict rainfall. This study aims to identify the most suitable forecasting model for rainfall data in the region. The two methods used in this study are Single Exponential Smoothing (SES) and Holt's Double Exponential Smoothing (DES). The results of the analysis showed that the SES method provided a higher level of accuracy compared to the DES Holt method, with a MAPE value of 33.37%. Thus, the SES model is considered the best method in predicting rainfall in the city of Pekanbaru.
Co-Authors A Martino Ade Novia Rahma Agustiawan Agus Ahmad Ahmad Faizal Ahmad Faizal Ahmad Faizal Ahmad Faizal Alfadri, Ramadhan Alfaizan Darman Alfitra Martino Amelia Zahara Andini, Chania Tri Anggraini, Resi Ari Pani Desvina Ayu - Octariana Clara Ramadhania Corry Corazon Marzuki Desasri, Rifa Dewi Sartika Dian Mursyitah Elvina Andiani Gamal, M.D.H Habibis Saleh Hasyratul Najmi Hazirah, Azra Irma Suryani Juliesty Huswina Khotimah Khotimah Kisty, Teshi Amelia Hakilla Latifah Hanum Lestari, Winda Ayu M.D.H Gamal Meli Ermanita Melvy Utari Permadhi Mexdika, Raja Putra Mohammad - Soleh Mohammad Soleh Mohammad Soleh Mohammad Soleh Muhammad Rizki muhammad soleh muhammad soleh Mulyani, Septia Mulyono Mulyono Nanda Putri Miefthawati Nazvira, Mutia Nilwan Andiraja Nilwan Andiraja Nilwan Andiraja Nur Azizah Br Barus Nur Ulfa Nuraisyah, Puteri Nurul Izzah Nusantoro, Dinda Kurniyawan Oktavia, Dhea Rizki Pebriani, Sovi Rahma, Adlul Finy Rahmadeni Rahmadeni Rahmadeni Rahmadeni Rahmadeni Rahmadeni Rahmadeni Rahmadeni Rahmawati Rahmi Yatul Husna M Rahmi, Nafia Resi Anggraini Resti Molina Resti Riafani Retno Ayu Puji Lestari Rielsa, Risca Amelya Rini Eka Putri Rini Erawati Riry Sriningsih Riska Armeliza Riska Wulandari Rudy Kurniawan Rudy Kurniawan Sarbaini Sarbaini Sarbaini Sarbaini Sari, Kiki Indah She Arssy Yesti Soleh, Mohammad Soleh Spastika, Galuh Mreta Sri Basriati Sri Sukmawati Syafrika Yuliarti Wartono Wartono Wartono Wartono Wazna Ulya Wina Yustari Winda Widiarti Yuhandi - - Yulanda, Rahmi Zukrianto, Zukrianto