Article Per Year (5 Year)
p-Index From 2021 - 2026
6.875
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 : 69 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 5 Documents
Search
Journal : Mathematics and Applications (MAp) Journal

 1 
PENGARUH LUAS LAHAN DAN PRODUKTIVITAS TERHADAP HASIL PRODUKSI KELAPA SAWIT MENGGUNAKAN METODE COBB DOUGLASS (STUDI KASUS: PTPN V, PEKANBARU) Safitri, Elfira; Basriati, Sri; Sari, Kiki Indah
MAp (Mathematics and Applications) Journal Vol 2, No 2 (2020)
Publisher : Universitas Islam Negeri Imam Bonjol Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (970.912 KB) | DOI: 10.15548/map.v2i2.2266

Abstract

Penggunaan minyak kelapa sawit terus meningkat seiring dengan pertumbuhan penduduk dunia. Perkembangan teknologi produksi dan peningkatan tingkat konsumsi penduduk, diperkirakan bahwa penggunaan minyak kelapa sawit akan terus meningkat. Penelitian ini bertujuan untuk mengetahui pengaruh luas lahan dan produktivitas terhadap hasil produksi kelapa sawit. Adapun metode yang digunakan adalah metode Cobb Douglass. Berdasarkan hasil pengolahan data diperoleh hasil uji asumsi klasik menunjukkan bahwa pengaruh luas lahan dan produktivitas terhadap hasil produksi kelapa sawit terbebas dari gejala multikolineritas, autokorelasi, heteroskedastisitas dan normalitas. Hasil koefisien determinasi dapat dijelaskan bahwa presentase sumbangan pengaruh yang diberikan variabel independen terhadap variabel dependen sebesar 99,6%. Pengolahan data menggunakan software SPSS versi 16.0 diperoleh  kesimpulan bahwa luas lahan dan produktivitas memiliki pengaruh terhadap hasil produksi kelapa sawit AbstractThe use of palm oil continues to increase along with the growth of the world's population, the development of production technology and the increase in the level of population consumption, it is estimated that the use of palm oil will continue to increase. This study aims to determine the effect of land area and productivity on oil palm production. The method used is the Cobb Douglas method. Based on the results of data processing, the classical assumption test results show that the effect of land area and productivity on oil palm production is free from the symptoms of multicolinearity, autocorrelation, heteroscedasticity and normality. The results of the coefficient of determination can be explained that the percentage contribution of the influence given by the independent variable to the dependent variable is 99.6%. Data processing using SPSS version 16.0 software, it can be concluded that land area and productivity have an influence on oil palm production.
PENGENDALIAN PERSEDIAAN OLI MESIN MENGGUNAKAN MODEL RE-ORDER POINT (ROP) DAN ECONOMIC ORDER QUANTITY (EOQ) Rahma, Ade Novia; Rielsa, Risca Amelya; Safitri, Elfira
MAp (Mathematics and Applications) Journal Vol 2, No 1 (2020)
Publisher : Universitas Islam Negeri Imam Bonjol Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1011.324 KB) | DOI: 10.15548/map.v2i1.1635

Abstract

Penelitian ini dilatarbelakangi oleh manajemen persediaan yang memiliki arti penting dalam perusahaan untuk menunjang kelancaran proses produksi. Hasil peneitian menunjukkan bahwa sistem pengendalian persediaan di PT. Nusantara Berlian Motor masih belum optimal yang disebabkan kebijakan manajemen yang masih menggunakan ilmu perkiraan atau belum ada pencatatan secara rinci serta belum ada perencanaan dalam pengendalian persediaan. Pada pehitungan ROP (Re-Order Point) pada perusahaan adalah sebanyak 780 unit. Perbedaan kebijakan persediaan yang telah diterapkan sebelumnya pada perusahaan yaitu tidak mencatat secara pasti kapan harus mengadakan pemesanan kembali. Tetapi menurut metode EOQ perusahaan harus melakukan pemesanan ulang kembali saat persediaan tinggal 780 unit agar kegiatan jual beli tidak terhambat. Maka dengan demikian ROP (Re-Order Point) dapat menjadi penentu untuk kelancaran proses jual beli.AbstractThis research is motivated by inventory management which has an important meaning in the company to support the smooth production process. The results showed that the inventory control system at PT. Nusantara Berlian Motor is still not optimal due to management policies that still use the science of estimation or there is no detailed recording and there is no proven planning in controlling inventory. In the calculation of ROP (Re-Order Points) in the company is 780 units. Differences in inventory policies that have been previously applied to the company that is not recording exactly when to reorder. But according to the EOQ method the company must reorder when there are only 780 units left so that the buying and selling activities are not hampered. So thus the ROP (Re-Order Point) can be a determinant for the smooth buying and selling process.
PENERAPAN PENUGASAN MULTI-OBJECTIVE UNTUK MENGOPTIMALKAN BIAYA, WAKTU DAN KUALITAS MENGGUNAKAN METODE HUNGARIAN Sri Basriati; Elfira Safitri; Muhammad Rizki
MAp (Mathematics and Applications) Journal Vol 5, No 1 (2023)
Publisher : Universitas Islam Negeri Imam Bonjol Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15548/map.v5i1.6118

Abstract

Various problems be facing by the company to get optimal results. One of them in this research is to optimize cost, time and quality simultaneous to get a minimal solution. The optimization of these problems uses the Hungarian method by applying multi-objective assignments. Based on the of the optimal solution results from one-objective, two-objective and three-objective assignments, these third-objective assignment is the best result. So that in the case example, the optimal solution is obtaining where the total cost incurred is Rp. 24,950,000. The total time required is 96 days. While the quality of the rattan flower vase is very good, the decorative lighting is very good and the mat is very good, the shelf is very good, the table is very good, the wardrobe is very good and the guest chair is very good.
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.
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.
Co-Authors -, Rahmadeni 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 Karimah, Isfi Zainul 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 Yuliani, Rizka Zukrianto, Zukrianto