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All Journal Jurnal Pendidikan Matematika (Kudus) MES: Journal of Mathematics Education and Science Mandalika Mathematics and Educations Journal Jurnal Akuntansi, Manajemen, dan Perencanaan Kebijakan
Gultom, Johannes
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Economics, Econometrics & Finance Mathematics

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Peran Quality Control Terhadap Kecacatan Produk (Studi Kasus pada Industri Kecil Menengah Sowita Gament) Muslimah Harti, Aryani; Gultom, Johannes; Ginting, Margaretha; Mayshinta, Maya; Pratiwi, Oktaviani Indah
Jurnal Akuntansi, Manajemen, dan Perencanaan Kebijakan Vol. 1 No. 4 (2024): June
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47134/jampk.v1i4.368

Abstract

Pengendalian kualitas suatu produk menjadi kunci yang utama dalam pengaruh kemajuan perusahaan agar meminimalkan produk yang mengalami kerusakan dalam memproduksikan suatu produk dan mendapatkan kepuasan dari pelanggan. Proses produksi yang mengutamakan kualitas produk akan menghasilkan produk yang bebas dari kerusakan. Oleh karena itu kualitas yang baik akan tercapai dari proses yang baik dan sesuai dengan standar kualitas yang ditetapkan berdasar dari riset keinginan pelanggan. Penelitian ini menggunakan penelitian kuantitatif dengan pendekatan observasional. Pengambilan sampel pada penelitian ini menggunakan teknik purposive sampling. Pengendalian kualitas terhadap produk dilakukan melalui kegiatan inspeksi/pemeriksaan, seperti Check Sheet, Histrogram, Peta Kendali (P-Chart), Diagram Sebab-Akibat (Fishbone), Rekomendasi/Usulan Perbaikan Kualitas. Hasil penelitian kualitas produk selalu dalam` batas aman dan tidak ada titik yang berada di luar batas kendali. Temuan tersebut mengindikasikan bahwa, proses produksi tetap terkendali dan tidak ada penyimpanan. Penelitian lebih lanjut dilakukan menggunakan histogram yang menunjukkan terdapat kerusakan produk sebanyak 103 pcs dari 2.079.
ANALISIS PERBEDAAN INDEKS PRESTASI KUMULATIF MAHASISWA PENDIDIKAN MATEMATIKA BERDASARKAN TIPE KEPRIBADIAN EKSTROVERT DAN INTROVERT Damanik, Yana Tasya; Irvan, Irvan; Gultom, Johannes
MES: Journal of Mathematics Education and Science Vol 10, No 2 (2025): Edisi April
Publisher : Universitas Islam Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/mes.v10i2.10513

Abstract

This research is a quantitative research employing an ex post facto approach aimed at examining the differences in Grade Point Average (GPA) of mathematics education students based on extrovert and introvert personality types. Data collection was conducted online using a validated personality questionnaire consisting of 20 items, distributed via the Google Form platform. The research sample comprised 28 students, including 14 extroverted and 14 introverted individuals. Data analysis involved a normality test using the Kolmogorov-Smirnov test and a hypothesis test using the Independent Samples t-test. The results showed that there was no significant difference in the GPA of mathematics education students between extrovert and introvert personality types. Therefore, personality type does not significantly influence students' academic achievement in terms of GPA within this context.
Desain Soal Cerita Matematika dengan Strategi Instruksional Solve It! Pada Materi Sistem Persamaan Linear Tiga Variabel Octaviani, Wina; Gultom, Johannes; Bayyinah, Nurul
Mandalika Mathematics and Educations Journal Vol 7 No 4 (2025): Desember
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jm.v7i4.10635

Abstract

Problem-solving skills are an important aspect that students must acquire both in learning and in everyday life. This is in line with the high standards set by the CCSS that students must have the ability to reason and apply mathematical thinking to world problems and challenges. One way to measure and improve problem-solving skills in mathematics classes is by providing story problems. The purpose of this study is to analyze, design, and develop a product in the form of a mathematical story problem design using the Solve It! learning strategy on the material of three-variable linear equation systems. The research method used is design and development research (DDR). The product was designed and tested on students, then evaluated based on the results of the trials that have been carried out. The development used is testing at a higher level with the diversity and needs of students in inclusive classes. As well as using PISA standard mathematical story problems to train students' problem-solving skills with simple instructions at each step of the solution. The results obtained can equip mathematics teachers with a student worksheet model for teaching three-variable linear equation systems with appropriate strategies to improve the mathematical problem-solving skills of students with learning disabilities.
The Effectiveness of Digital Media on Understanding Mathematical Concepts and Problem Solving Abilities: Systematic Literature Review Gultom, Johannes; Sembiring, Bertha Oktavika; Apriani, Yuni
Jurnal Pendidikan Matematika Vol 8, No 1 (2025): Jurnal Pendidikan Matematika (Kudus)
Publisher : Universitas Islam Negeri Sunan Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21043/jpmk.v8i1.25758

Abstract

This study aims to examine the effectiveness of digital media on students' conceptual understanding and mathematical problem solving abilities. This research employed a Systematic Literature Review (SLR) approach, drawing data from 33 national and international journal articles that have been identified, evaluated, and categorized based on predefined criteria relevant to the study objectives. The results of this study indicate that (1) the integration of digital media in mathematics learning is effective in enhancing students’ understanding of mathematical concepts and their problem-solving abilities, (2) the combination of digital media with appropriate learning models yields greater effectiveness, (3) the most frequently utilized digital tools are GeoGebra and Lectora Inspire, often integrated with contextual and constructivist approaches, (4) digital media plays a significant role in improving students’ mathematical understanding and problem-solving skills, especially when delivered through interactive multimedia that incorporates diverse learning components and meets the criteria of validity, practicality, and effectiveness for classroom implementation. Penelitian ini bertujuan untuk mengkaji efektivitas media digital dalam meningkatkan pemahaman konsep matematika dan kemampuan pemecahan masalah siswa. Metode yang digunakan dalam penelitian ini adalah Systematic Literature Review (SLR), dengan data diperoleh dari 33 artikel jurnal nasional dan internasional. Sumber-sumber tersebut dipilih melalui proses identifikasi, evaluasi, dan kategorisasi yang ketat berdasarkan kriteria yang telah ditetapkan sesuai dengan tujuan penelitian. Hasil dalam penelitian ini adalah (1) penggunaan media digital dalam pembelajaran matematika efektif dalam meningkatkan pemahaman konseptual dan kemampuan pemecahan masalah siswa; (2) Integrasi model pembelajaran dengan media digital meningkatkan efektivitas keseluruhan proses pembelajaran; (3) Alat digital yang paling sering digunakan adalah GeoGebra dan Lectora Inspire, yang umumnya diterapkan bersamaan dengan pendekatan pembelajaran kontekstual dan konstruktivis; (4) Media digital memainkan peran penting dalam meningkatkan pemahaman matematika dan kemampuan pemecahan masalah, terutama ketika disajikan dalam bentuk multimedia interaktif yang diperkaya dengan berbagai komponen pembelajaran, yang telah divalidasi sebagai praktis, efektif, dan layak digunakan di kelas.
Co-Authors Apriani, Yuni Bayyinah, Nurul Damanik, Yana Tasya Ginting, Margaretha Irvan Irvan Mayshinta, Maya Muslimah Harti, Aryani Octaviani, Wina Pratiwi, Oktaviani Indah Sembiring, Bertha Oktavika