Article Per Year (5 Year)
p-Index From 2021 - 2026
5.911
P-Index
This Author published in this journals
All Journal Matematika: Jurnal Teori dan Terapan JUARA : Jurnal Olahraga ALGORITMA : Journal of Mathematics Education International Journal of Global Operations Research International Journal of Quantitative Research and Modeling Jurnal Riset Matematika Bandung Conference Series: Mathematics Journal of Medives: Journal of Mathematics Education IKIP Veteran Semarang Matematika SmartComp Jurnal Pendidikan MIPA
Didi Suhaedi
Program Studi Matematika Fakultas Matematika Dan Ilmu Pengetahuan Alam Universitas Islam Bandung
Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Mathematics Physics Transportation Other

Published : 47 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 47 Documents
Search

 1   2   3   4   5 
Estimasi Keuntungan Penjualan dengan Fuzzy Subtractive Clustering dan FIS Sugeno Orde-1 Ashri Nur Aisyah; Didi Suhaedi
Jurnal Riset Matematika Volume 5, No.1, Juli 2025, Jurnal Riset Matematika (JRM)
Publisher : UPT Publikasi Ilmiah Unisba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/jrm.v5i1.6411

Abstract

Abstract. This research aims to develop a sales profit estimation model for Himatex, a textile distributor, using sales data from January 2021 to May 2023. The model is built through the application of fuzzy logic, specifically employing the fuzzy subtractive clustering method and the Sugeno Order-1 Fuzzy Inference System. The study involves two key processes: clustering sales data and implementing an inference system, both of which are integrated into the fuzzy logic framework. A significant issue faced by the distributor is the lack of attention to fabric types, leading to overstocking in warehouses. This stockpiling results in a mismatch between market demand and supply, causing financial losses. The research findings indicate that setting a radius value of 0.18, an accept ratio of 0.5, a reject ratio of 0.15, and a squash factor of 1.25, along with boundary values of [0; 0; 0] and [3,000; 60,000,000; 25,000,000], leads to the formation of five clusters and five profit estimation models. Data testing, using an average fabric yardage of 279 meters and an average sales value of Rp. 16,274,256, resulted in an estimated average profit of Rp. 4,696,327. The model demonstrated a low cumulative error percentage of 9.0919%, indicating high forecasting accuracy. Consequently, this model is suitable for textile distributors. Abstrak. Tujuan dari penelitian ini yaitu menentukan model estimasi keuntungan penjualan dengan data penjualan kain tekstil distributor Himatex di bulan Januari 2021-Mei 2023 melalui penerapan logika fuzzy menggunakan metode Fuzzy Subtractive Clustering dan Fuzzy Inference System Sugeno Orde- 1. Untuk menentukan model estimasi keuntungan penjualan terdapat 2 proses, yaitu proses clustering data dan melakukan inference system, kedua proses ini termasuk kedalam pembahasan yang sama yaitu dalam penerapan logika fuzzy. Masalah yang terjadi dalam distributor ini yaitu tidak memperhatikan jenis kain di minggu keberapa yang harus tingkatkan penjualannya, sehingga terjadinya penimbunan kain di dalam gudang. Dengan adanya penimbunan di gudang mengakibatkan ketidaksesuaian permintaan pasar dan juga penjualan mengalami sejumlah kerugian. Berdasarkan hasil penelitian yang telah dilakukan, dengan mengatur nilai jari-jari sebesar 0,18, nilai accept ratio sebesar 0,5, nilai reject ratio sebesar 0,15, nilai squash factor sebesar 1,25, [0; 0; 0], dan [3.000; 60.000.000; 25.000.000] diperoleh 5 cluster dan 5 persamaan model estimasi keuntungan penjualan. Hasil dari pengujian data menunjukan bahwa dengan menginputkan variabel rata-rata yard 279 meter, rata-rata penjualan Rp. 16.274.256, menghasilkan output rata-rata keuntungan penjualan sebanyak Rp. 4.696.327. Dari hasil pengolahan data, keseluruhan data telah diuji oleh presentase galat kumulatif sebanyak 9,0919%, dan kesalahan tersebut cukup rendah, dalam artian estimasi atau peramalan sangat baik. Sehingga model yang terbentuk pada penelitian ini dapat diajukan pada distributor kain tekstil.
Penggunaan Metode ROC dan PROMETHEE II Pada Pemilihan Investasi Sektor Perbankan Lestari, Tira Ayu Verania; Didi Suhaedi
Jurnal Riset Matematika Volume 5, No.1, Juli 2025, Jurnal Riset Matematika (JRM)
Publisher : UPT Publikasi Ilmiah Unisba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29313/jrm.v5i1.6441

Abstract

Abstract. This study focuses on the selection of banking sector investments listed in the LQ45 Index. Investment in the banking sector plays an important role in the economy. However, investors have difficulty in choosing the right company based on the bank's financial health. To help assess a healthy company, various assessment criteria can be set such as Capital Adequacy Rate, Non Performing Loan, Return On Asset, Return On Equity, Net Interest Margin, Operating Costs and Operating Income, and Loan to Deposit Ratio. Meanwhile, to help select investments, this study uses the Rank Order Centroid method to determine the weight value of each criterion and Promethee II to determine the ranking order of alternative investments. The calculation results using the Promethee II method show that alternative Bank 3 (A3) (net flow = 0.27) as the first ranked alternative, Bank 2 (A2) (net flow = 0.24) as the second ranked alternative, Bank 1 (A1) and Bank 7 (A7) (net flow = -0.01) as the third ranked alternative, Bank 5 (A5) (net flow = -0.03) as the fourth ranked alternative, Bank 6 (A6) (net flow = -0.15) as the fifth ranked alternative, and Bank 4 (A4) (net flow = -0.32) as the sixth ranked alternative. Abstrak. Penelitian ini berfokus pada pemilihan investasi sektor perbankan yang terdaftar dalam Indeks LQ45. Investasi dalam sektor perbankan mempunyai peran penting dalam perekonomian. Namun, bagi investor terdapat kesulitan dalam memilih perusahaan yang tepat berdasarkan kondisi kesehatan finansial bank. Untuk membantu menilai perusahaan yang sehat, dapat ditetapkan berbagai kriteria penilaian seperti Capital Adequacy Rate, Non Performing Loan, Return On Asset, Return On Equity, Net Interest Margin, Biaya Operasional dan Pendapatan Operasional, dan Loan to Deposit Ratio. Sedangkan untuk membantu pemilihan investasi, penelitian ini menggunakan metode Rank Order Centroid untuk menentukan nilai bobot dari setiap kriteria dan Promethee II untuk menentukan urutan perankingan alternatif investasi. Hasil perhitungan menggunakan metode Promethee II menunjukkan bahwa alternatif Bank 3 () (net flow = 0,27) sebagai alternatif peringkat pertama, Bank 2 () (net flow = 0,24) sebagai alternatif peringkat kedua, Bank 1 () dan Bank 7 () (net flow = -0,01) sebagai alternatif peringkat ketiga, Bank 5 () (net flow = -0,03) sebagai alternatif peringkat keempat, Bank 6 () (net flow = -0,15) sebagai alternatif peringkat kelima, dan Bank 4 () (net flow = -0,32) sebagai alternatif peringkat keenam.
Unveiling the Geometry of Culture: An Ethnomathematical Exploration of Transformation Geometry in Cimahi Batik Motifs Purniati, Tia; Suhaedi, Didi
Jurnal Pendidikan MIPA Vol 26, No 4 (2025): Jurnal Pendidikan MIPA
Publisher : FKIP Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jpmipa.v26i4.pp2518-2541

Abstract

Mathematics played an essential role in daily life. However, mathematics learning in schools was often less connected to students' real-life contexts, so many of them struggle to understand mathematical concepts. Relating mathematics to everyday life was necessary for students to understand its relevance and benefits. This research aimed to explore the cultural values and concepts of transformation geometry embedded in Cimahi batik motifs. The method used in this study was ethnographic, with the research conducted in Lembur Batik, Cimahi, West Java, Indonesia. The research framework in ethnomathematics adopted four key questions to inform the framework used to facilitate research, “Where should observations be made from?, "How is the observation process carried out?” "What are the results of these observations?", and “What is the meaning of it?. The investigator served as the instrument in the data-gathering process and used triangulation involving interviews, observations, and literature review. Analysis occurred in three stages: data condensation, data display, and drawing of conclusion. The study found that Cimahi batik motifs embody cultural values that reflect the identity of the Cimahi community. Moreover, these motifs employed concepts of transformation geometry, such as translation, reflection, rotation, and dilation. The distinctive feature of these findings is the association between the motif beauty of Cimahi batik and the use of transformation-geometry concepts derived from local culture. This is what makes the batik motif from Cimahi a valuable context for learning mathematics, particularly geometry. This has significant implications for the growth of ethnomathematics, as it means that geometrical concepts can be incorporated into local cultural frameworks within situational mathematics learning grounded in indigenous cultural knowledge.     Keywords: culture, transformation geometry, ethnomathematics, Cimahi batik motif.  
SIMULASI KEMACETAN LALU LINTAS PADA LOKASI BUNDARAN BALTOS BANDUNG Dewi, Tresna; Badruzzaman, Farid; Fajar, Yusuf; Suhaedi, Didi; Harahap, Erwin
Smart Comp :Jurnalnya Orang Pintar Komputer Vol 9, No 2 (2020): Smart Comp :Jurnalnya Orang Pintar Komputer
Publisher : Politeknik Harapan Bersama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30591/smartcomp.v9i2.1768

Abstract

Pada masa kini perkembangan teknologi telah memacu meningkatnya kepemilikan kendaraan, terutama di beberapa kota seperti Jakarta, Bandung, Yogyakarta, dan kota besar lainnya. Situasi ini menimbulkan masalah yaitu kemacetan lalu lintas dimana salah satu penyebabnya adalah kepemilikan kendaraan yang semakin bertambah setiap tahun. Kondisi ini tidak didukung dengan keadaan infrastruktur dan sumber daya yang terbatas, disamping fasilitas lalu lintas yang pengoperasiannya masih belum optimal. Penyebab lain dari kemacetan lalu lintas ini adalah banyaknya angkutan umum yang sering berhenti sembarangan, keluar masuk area parkir, dan persilangan kendaraan di persimpangan. Oleh karena itu pada artikel ini dilakukan penelitian untuk mengetahui penyebab dalam masalah kemacetan dan diharapkan ditemukan solusi pemecahan masalah. Dalam penelitian ini, dirancang sistem simulasi arus lalu lintas dengan menggunakan aplikasi SimEvents yang dijalankan pada software MATLAB Simulink. Berdasarkan simulasi, dapat diprediksi penyebab kemacetan lalu lintas khususnya di lokasi Bundaran Balubur Town Square (BALTOS) Kota Bandung Jawa Barat.Kata kunci : kemacetan, lalu lintas, simevents, matlab
Value Input Application (E-Pak) Functional Position of Bandung City Health Department Based on Web Database Syahrul Zein; Onoy Rohaeni; Farid Badruzzaman; Yusuf Fajar; Didi Suhaedi; Erwin Harahap
International Journal of Quantitative Research and Modeling Vol. 3 No. 1 (2022): International Journal of Quantitative Research and Modeling
Publisher : Research Collaboration Community (RCC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijqrm.v3i1.255

Abstract

Technology is present and becomes a part of human life. Each era has its own technological advantages. The history of technology begins millions of years ago. The first technology discovered by mankind was to create sharp stone chips which were used as stones. Then humans began to develop and found several technologies, one of which was computers and the internet. computers and the internet have a close relationship, especially in today's era where all activities cannot be separated from computers and the internet. One of these activities is in the office world. The Bandung City Health Office is a government agency that has a lot of data, especially in the section where the author is placed, namely the Division of Human Resources and Health or SDMK. The SDMK Division is tasked with receiving data on the credit score of a functional position from the assessment team to calculate whether a functional position is eligible for promotion or not. On that basis, the purpose of this paper is to create an application for inputting the credit score for a functional position based on a web database to make it easier for the assessment team, SDMK to view, recap and change credit scores as well as a functional position in viewing its credit score. The main finding is a web database-based application called E-PAK.
Mathematical Modeling to Estimate Non-Tax State Revenues Rahadatul Aisyi; Friska Anzalni; Yusuf Fajar; Didi Suhaedi; Erwin Harahap
International Journal of Quantitative Research and Modeling Vol. 3 No. 2 (2022): International Journal of Quantitative Research and Modeling
Publisher : Research Collaboration Community (RCC)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46336/ijqrm.v3i2.258

Abstract

Mathematics is the basic foundation for other sciences. Equation is a mathematical model that can describe real-life problems, one of which is estimating non-tax state revenues in the coming year. Non-State Revenue (penerimaan negara bukan pajak, PNBP) is the scope of state finances which is equipped with the State Assets and Auction Service Office (kantor pelayanan keuangan negara dan lelang, KPKNL) which must be reported on the realization of PNBP that will be deposited into the state treasury. Such situation happens because expenditures in each government agency will be available and increase every year by the government. Therefore, direktorat jenderal keuangan negara (DJKN) have to be more optimal in the management of the PNBP. This study aims to determine the results of the best estimates and exponential models in estimating non-tax state income at the KPKNL Bandung, Indonesia, in year of 2017 and 2018. This research includes descriptive research using a qualitative approach. The results show that the calculation using the exponential 4th model is the best model for estimating PNBP such that the estimated PNBP results in 2017 is Rp. 574,775,677 and in 2018 is Rp. 798,022,691.
EKSPLORASI ETNOMATEMATIKA PADA KUFI MURABBA’ MASJID AL-MULTAZAM CHERRY FIELD BANDUNG Didi Suhaedi; Maulida Isfahany Fajry; Tia Purniati
ALGORITMA: Journal of Mathematics Education Vol. 8 No. 1 (2026): ALGORITMA: Journal Of Mathematics Education
Publisher : Faculty of Educational sciences, UIN Syarif Hidayatullah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15408/ajme.v8i1.51166

Abstract

Abstract Proportion and symmetry are important topics in school mathematics, but in fact, they are still difficult for some students to master. One cause is that the learning is not contextual and lacks relevance to students' everyday lives. This study aims to explore ethnomathematics in the Kufi Murabba’ facade of the Al-Multazam Mosque in Cherry Field Bandung, as an alternative source of mathematics learning that is close to the students. The research employed ethnographic methods. Data were collected through observation, interviews, and documentation, and analyzed using triangulation techniques to obtain valid data. The research results show that the Kufi Murabba’ on the facade of Al-Multazam Cherry Field Bandung Mosque contains geometric elements, which are relevant as a learning context for students on the topics of proportion and symmetry. Thus, the Kufi Murabba’ on the facade of Al-Multazam Cherry Field Bandung Mosque can be used as a learning resource for proportion and symmetry. The use of Kufi calligraphy makes learning more contextual, interactive, and meaningful, helping students master the material better and enhancing appreciation of local culture. Abstrak Proporsi dan simetri merupakan materi penting dalam matematika sekolah, tetapi faktanya masih sulit dikuasai oleh sebagian siswa. Salah satu penyebabnya adalah pembelajaran yang belum  kontekstual dan kurang relevan dengan konteks kehidupan sehari-hari siswa. Penelitian ini bertujuan untuk melakukan eksplorasi etnomatematika pada Kufi Murabba’ fasad Masjid Al-Multazam Cherry Field Bandung, sebagai alternatif sumber belajar matematika yang dekat dengan siswa. Penelitian dilakukan menggunakan metode etnografi. Data dikumpulkan melalui observasi, wawancara, dan dokumentasi, serta dianalisis menggunakan teknik triangulasi sehingga diperoleh data yang valid. Hasil penelitian menunjukkan bahwa Kufi Murabba’ fasad Masjid Al-Multazam Cherry Field Bandung memiliki unsur-unsur geometris yang relevan sebagai konteks belajar bagi siswa pada materi proporsi dan simetri. Dengan demikian, Kufi Murabba’ pada fasad Masjid Al-Multazam Cherry Field Bandung dapat digunakan sebagai sumber belajar tentang proporsi dan simetri. Penggunaan kaligrafi kufi tersebut membuat pembelajaran lebih kontekstual, interaktif dan bermakna, sehingga membantu siswa menguasai materi dengan lebih baik serta meningkatkan apresiasi terhadap budaya lokal.
Co-Authors 10060221008, Rini Kurniasih 10060221010, Niati Asma 10060221016, Sabrina Vidya Siswantoro 10060221020, Jumidah Agnia Romadhona Ali Mulki Andriyani, Devy Angga Aditya Pratama Anggie Irfhan Refhiansyah Annisa Melinia Rahayu Ashri Nur Aisyah Asyifaa Nabilah Asyifaa Nabilah Nurfadhilah Audina Tri Hardiyani Badruzzaman, Farid Dadang Juandi Depi Siti Nurjanah Devie Ratna Mutia Elsa Fitria Emas Marlina Erwin Harahap Erwin Harahap Erwin Harahap Eti Kurniati Eti Kurniati Evi Nur Aliyah Syari Fajar, Yusuf Fargiana, Farid Farid Badruzzaman Farid Badruzzaman Farid H Badruzzaman Farid Hirji Badruzzaman Firdy Adi Friska Anzalni Gani Gunawan Gian Fitriani Utami Gina Enzellina Heryana, Rowina Windiyani Hilwa Gifti Salsabila Hilwa Gifty Salsabila Icih Sukarsih Lestari, Tira Ayu Verania M Yusuf Fajar Maulida Isfahany Fajry Meiske Shabrina Pesik Monica, Diva Muhammad Hamzah Onoy Rohaeni Rahadatul Aisyi Respitawulan, R Rida Deana Sajidul Fajri Sentya Agus Savitri Syahrul Zein Tia Purniati Tresna Dewi Tresna Dewi Tresna Dewi Fadiini Turmudi Widodo Budi Yani Ramdani Yurika Permanasari Yurika Permanasari Yurika Permanasari Yurika Permanasari Yusuf Fajar