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Nugraha, Depi Ardian
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Optimasi Produksi Payung Geulis Menggunakan Model Program Linier pada Pengrajin Payung Geulis di Kota Tasikmalaya Wiwin, Wiwin; Fatimatuzzahra, Mayla; Athaillah, Cayla; Azizah, Nurul; Nugraha, Depi Ardian
Polinomial : Jurnal Pendidikan Matematika Vol. 5 No. 1 (2026)
Publisher : Papanda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56916/jp.v5i1.3080

Abstract

The production of payung geulis, a traditional craft from Tasikmalaya, is still largely carried out intuitively without considering the efficiency of capital use, raw materials, and working time. This condition often leads artisans to inaccuracies in determining production quantities, resulting in profits that are not yet optimal. This study aims to determine the most profitable production strategy through the application of a linear programming model using the Simplex method. A mathematical modeling approach was employed to describe the resource constraints faced by artisans, including capital limitations, raw material availability, and production capacity. Data were collected through direct observation and interviews, then formulated into decision variables representing the number of large, medium, and small umbrellas to be produced. The objective function was designed to maximize profit, while the constraints were developed based on material consumption, capital allocation, and production duration. The results indicate that the optimal solution is dynamic and depends on the profit per unit of each product type. In the first scenario, with a particular set of constraints, a maximum profit of Rp 6,000,000 is achieved when 400 large umbrellas are produced. In the second scenario, with a different profit structure, the maximum value of Rp 34,800,000 is obtained when production is entirely focused on small umbrellas totaling 2,320 units. These differences demonstrate that linear programming can determine the most efficient production strategy under varying resource conditions. Thus, the Simplex method proves to be an effective decision-support tool for artisans seeking to enhance profitability in a rational and measurable manner.
Pengembangan Media Kartu TRIGUNO pada Materi Sudut Istimewa Trigonometri Amelia, Fadhila Sri; Nugraha, Depi Ardian; Prabawati, Mega Nur
Imajiner: Jurnal Matematika dan Pendidikan Matematika Vol 8, No 1 (2026): Imajiner: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/imajiner.v8i1.26078

Abstract

Sudut Istimewa Trigonometri penting untuk diingat sebagai bekal untuk menyelesaikan masalah yang lebih kompleks, namun kenyataannya banyak peserta didik yang masih tertukar. Penelitian ini bertujuan untuk menilai kevalidan, kepraktisan, dan keefektifan media kartu TRIGUNO untuk membantu mengurangi kesulitan belajar dan melatih daya ingat peserta didik. Metode yang digunakan yaitu Research and Development dengan menggunakan model ADDIE. Teknik pengumpulan data melalui wawancara semi terstruktur untuk mengidentifikasi permasalahan yang ada di lapangan, kuesioner validasi ahli materi dan media untuk menilai kevalidan produk, kuesioner respon peserta didik untuk menilai kepraktisan produk, serta soal tes untuk mengukur efektivitas produk. Instrumen penelitian yang digunakan mencakup pedoman wawancara, lembar validasi ahli materi dan media, serta soal tes kesulitan belajar dan daya ingat. Sumber data dalam penelitian ini yaitu pendidik, peserta didik SMA Negeri 8 Tasikmalaya, dua ahli materi, dan dua ahli media. Analisis data meliputi analisis wawancara, validasi dengan rumus Aiken, analisis kepraktisan berdasarkan persentase respon peserta didik, serta analisis efektivitas berdasarkan persentase ketuntasan belajar. Hasil penelitian menunjukkan bahwa media TRIGUNO memperoleh indeks Aiken 0,972 pada validasi materi dan 0,991 pada validasi media dengan kategori “sangat valid”, tingkat kepraktisan 88,4% dengan kategori “sangat praktis”, keefektifan pada aspek membantu mengurangi kesulitan belajar berada pada kategori “cukup efektif” serta aspek melatih daya ingat pada kategori “efektif”. Temuan ini menunjukkan bahwa media kartu TRIGUNO dapat digunakan sebagai suplemen dan variasi dalam pembelajaran matematika dengan cara yang menyenangkan.
Validasi Psikometrik Instrumen Digital Preferensi Sensori untuk Deteksi Gaya Belajar Matematika Siswa Sekolah Menengah Santika, Satya; Nugraha, Depi Ardian; Mansyur, Muhamad Zulfikar; Marsika, Refi Dwi; Hendarman, Sherly Agustina
JP3M (Jurnal Penelitian Pendidikan dan Pengajaran Matematika) Vol 10, No 2 (2024)
Publisher : Program Studi Pendidikan Matematika, FKIP, Universitas Siliwangi, Tasikmalaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37058/jp3m.v10i2.18066

Abstract

The urgency to individualize mathematics instruction in secondary education has highlighted the necessity for reliable, contextually appropriate assessment tools that identify students’ sensory learning preferences. However, existing instruments—especially digital ones—often lack rigorous psychometric validation, limiting their practical and theoretical utility. This study aimed to develop and validate a digital instrument for assessing sensory learning preferences (visual, auditory, kinesthetic) among Indonesian middle school students, focusing on content validity, construct validity, internal consistency, and item discrimination. Employing a research and development approach using the ADDIE model, the instrument was created through a participatory process involving experts in mathematics, educational psychology, and digital learning, alongside teachers and students. Validation processes included expert content review, pilot testing, and large-scale field implementation with 134 students from diverse urban and peri-urban schools in Tasikmalaya. Content validity indices indicated high expert agreement, while exploratory and confirmatory factor analyses confirmed a robust three-factor structure consistent with theoretical expectations. Reliability analysis revealed strong internal consistency across all dimensions. All items demonstrated satisfactory discrimination power. The digital instrument was positively received by both teachers and students, facilitating efficient identification of students’ dominant learning preferences and supporting adaptive mathematics instruction. This research provides empirical evidence for the feasibility and utility of psychometrically validated digital assessment in Indonesian educational settings, offering a scalable tool to promote data-driven instructional differentiation. Future studies are recommended to further expand the instrument’s scope and examine its impact on learning outcomes longitudinally.Keywords:          sensory learning preferences; digital assessment; psychometric validation; mathematics education; secondary school.
Pengembangan Media Kartu TRIGUNO pada Materi Sudut Istimewa Trigonometri Amelia, Fadhila Sri; Nugraha, Depi Ardian; Prabawati, Mega Nur
Imajiner: Jurnal Matematika dan Pendidikan Matematika Vol 8, No 1 (2026): Imajiner: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/imajiner.v8i1.26078

Abstract

Sudut Istimewa Trigonometri penting untuk diingat sebagai bekal untuk menyelesaikan masalah yang lebih kompleks, namun kenyataannya banyak peserta didik yang masih tertukar. Penelitian ini bertujuan untuk menilai kevalidan, kepraktisan, dan keefektifan media kartu TRIGUNO untuk membantu mengurangi kesulitan belajar dan melatih daya ingat peserta didik. Metode yang digunakan yaitu Research and Development dengan menggunakan model ADDIE. Teknik pengumpulan data melalui wawancara semi terstruktur untuk mengidentifikasi permasalahan yang ada di lapangan, kuesioner validasi ahli materi dan media untuk menilai kevalidan produk, kuesioner respon peserta didik untuk menilai kepraktisan produk, serta soal tes untuk mengukur efektivitas produk. Instrumen penelitian yang digunakan mencakup pedoman wawancara, lembar validasi ahli materi dan media, serta soal tes kesulitan belajar dan daya ingat. Sumber data dalam penelitian ini yaitu pendidik, peserta didik SMA Negeri 8 Tasikmalaya, dua ahli materi, dan dua ahli media. Analisis data meliputi analisis wawancara, validasi dengan rumus Aiken, analisis kepraktisan berdasarkan persentase respon peserta didik, serta analisis efektivitas berdasarkan persentase ketuntasan belajar. Hasil penelitian menunjukkan bahwa media TRIGUNO memperoleh indeks Aiken 0,972 pada validasi materi dan 0,991 pada validasi media dengan kategori “sangat valid”, tingkat kepraktisan 88,4% dengan kategori “sangat praktis”, keefektifan pada aspek membantu mengurangi kesulitan belajar berada pada kategori “cukup efektif” serta aspek melatih daya ingat pada kategori “efektif”. Temuan ini menunjukkan bahwa media kartu TRIGUNO dapat digunakan sebagai suplemen dan variasi dalam pembelajaran matematika dengan cara yang menyenangkan.
Co-Authors Amelia, Fadhila Sri Athaillah, Cayla Bariatul, Zahra Danirat, Mustika Dwi Dewi, Sinta Verawati Fatimatuzzahra, Mayla Gustiana, Irpan Hendarman, Sherly Agustina Hetty Patmawati Maheltra, Alma Nesya Mansyur, Muhamad Zulfikar Marsika, Refi Dwi Mega Nur Prabawati, Mega Nur Melinda, Salma Mustapidah, Elda Nani Ratnaningsih Nashrulloh, Fahreza Novita, Sofi Nugraheni, Galuh Tri Nurfadillah, Zahra Awalia Nurleni, Siti NURUL AZIZAH Rafiqoh, Ulya Wildati Redi Hermanto Renaldie, Bima Arya Sadiah, Rifa Maulia Santika, Satya Sopariah, Sopariah Sri Tirto Madawistama Suhaya Suhaya, Suhaya Suherman, Riska Marisa Sukirwan Sukirwan Tabina, Salwa Windani, Wiwin Wiwin Wiwin, Wiwin