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All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis dCartesian: Jurnal Matematika dan Aplikasi Jurnal Buana Informatika JSM (Jurnal SIFO Mikroskil) JUTI: Jurnal Ilmiah Teknologi Informasi JTSL (Jurnal Tanah dan Sumberdaya Lahan) Jurnal Teknologi Informasi dan Ilmu Komputer Jurnas Nasional Teknologi dan Sistem Informasi Journal of Information System Sistemasi: Jurnal Sistem Informasi Jurnal Teknologi Sistem Informasi dan Aplikasi Indonesian Journal of Computing and Modeling JIPI (Jurnal Ilmiah Penelitian dan Pembelajaran Informatika) JOISIE (Journal Of Information Systems And Informatics Engineering) Jutisi: Jurnal Ilmiah Teknik Informatika dan Sistem Informasi Progresif: Jurnal Ilmiah Komputer Journal of Information Systems and Informatics Tematik : Jurnal Teknologi Informasi Komunikasi Jurasik (Jurnal Riset Sistem Informasi dan Teknik Informatika) Journal of Information Technology Ampera JINAV: Journal of Information and Visualization Journal of Computer and Information Systems Ampera Journal of Information Technology (JIfoTech) J-SAKTI (Jurnal Sains Komputer dan Informatika) Algoritme Jurnal Mahasiswa Teknik Informatika Jurnal Locus Penelitian dan Pengabdian JEECS (Journal of Electrical Engineering and Computer Sciences) d'Cartesian: Jurnal Matematika dan Aplikasi semanTIK Jurnal Abdimas JuTISI (Jurnal Teknik Informatika dan Sistem Informasi) Jurnal DIMASTIK
Charitas Fibriani
Universitas Kristen Satya Wacana
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Library & Information Science Mathematics Social Sciences

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Vegetable Sales Transaction Segmentation using K-Means Clustering for Sales Strategy Optimization Dimas Wahyu Eko Prasetyo; Charitas Fibriani (SCOPUS ID=57192643331)
SISTEMASI Vol 15, No 8 (2026): Sistemasi: Jurnal Sistem Informasi
Publisher : Universitas Islam Indragiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32520/stmsi.v15i8.6674

Abstract

Managing fresh vegetable inventory requires accurate decision-making because of its limited shelf life and variations in unit prices and sales volumes. This study aims to segment vegetable sales transactions at D2 Vegetables, a vegetable supplier, using K-Means Clustering based on unit price and sales volume; evaluate cluster quality; and develop operational recommendations based on the characteristics of each segment. The dataset consists of 1,016 vegetable sales transactions recorded from June 25, 2024, to June 23, 2025. The analytical procedures included data preprocessing, standardization, determination of the optimal number of clusters using the Elbow Method, evaluation using the Silhouette Coefficient and Davies-Bouldin Index, K-Means clustering, and comparison with Agglomerative Hierarchical Clustering. Internal evaluation indicated that K = 2 achieved the highest Silhouette Coefficient (0.6114) and the lowest Davies-Bouldin Index (0.5156). However, K = 3 was selected by considering the Elbow pattern, cluster structure quality, and interpretability of the resulting three transaction segments. At K = 3, K-Means achieved a Silhouette Coefficient of 0.5719 and a Davies-Bouldin Index of 0.6029, outperforming Agglomerative Clustering, which achieved scores of 0.5031 and 0.6595, respectively. The resulting segmentation comprised 682 Standard transactions (67.13%), 235 Bulk transactions (23.13%), and 99 Premium transactions (9.74%). The Bulk segment had the highest total sales volume, the Standard segment had the largest number of transactions and the greatest diversity of vegetable types, while the Premium segment had the highest average unit price and relatively low sales volume. The segmentation results can serve as a decision-support basis for procurement planning, inventory management, storage allocation, and segment-specific promotional strategies, enabling operational decisions to be aligned with the characteristics of each transaction segment.
Usability Analysis of the SIPBSI Website using the System Usability Scale as a Basis for Interface Improvement Priorities Kieky Adrian Sarwono; Charitas Fibriani (SCOPUS ID=57192643331)
SISTEMASI Vol 15, No 8 (2026): Sistemasi: Jurnal Sistem Informasi
Publisher : Universitas Islam Indragiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32520/stmsi.v15i8.6814

Abstract

The Information System of the Indonesian Badminton Association (SIPBSI) is a web-based system designed to manage athlete, club, and ranking data in an integrated manner. The successful implementation of such a system is determined not only by its functionality but also by its level of usability, which influences user satisfaction and acceptance. However, the usability of SIPBSI from the users’ perspective has not yet been clearly established. This study aims to evaluate the usability level of the SIPBSI website using the System Usability Scale (SUS) and to develop prioritized recommendations for interface improvement. A quantitative approach was employed, with data collected through a SUS questionnaire administered to 30 respondents who were active club coaches in Salatiga City. The research procedures included calculating the SUS score, analyzing the mean scores of individual items, and mapping the results onto usability aspects, including learnability, consistency, complexity, need for assistance, and interface clarity. The results show that the SIPBSI website achieved an average SUS score of 62. Based on SUS interpretation, this score corresponds to Grade D, with an adjective rating of “Poor” and an acceptability rating of “Marginal.” Further analysis revealed that the main usability issues were related to need for assistance (2.20), learnability (2.22), consistency (2.30), complexity (2.33), and interface clarity (2.46). These findings indicate that the usability of the system still needs improvement, as usability issues may hinder the effectiveness of data management and access in supporting PBSI operations at both regional and national levels. The redesign recommendations focus on simplifying navigation and user flows, improving interface consistency, and providing clear instructions or user assistance features. This study is expected to serve as an evaluation reference and provide practical recommendations for developers to improve the quality and usability of the SIPBSI website.
Design of Information Technology Governance for Employee Training Data Management using the COBIT 2019 Design Toolkit Mayer Jeloe Susilo Perdana; Charitas Fibriani (SCOPUS ID=57192643331)
SISTEMASI Vol 15, No 8 (2026): Sistemasi: Jurnal Sistem Informasi
Publisher : Universitas Islam Indragiri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32520/stmsi.v15i8.6625

Abstract

The rapid advancement of technology in the digital era requires companies to continuously innovate to remain competitive. The implementation of information technology has become a crucial factor in sustaining business operations, particularly in data management and data quality. PT XYZ faces challenges in managing employee training data due to the absence of an integrated system, resulting in data inaccuracies and inconsistencies. The COBIT 2019 framework enables the company to identify gaps between its current governance practices and the governance processes required to support organizational objectives. The recommendations derived from the audit based on the COBIT 2019 Design Factors indicate that the company needs to develop an integrated system as a fundamental foundation for improving data quality and harmonization in alignment with business objectives and decision-making requirements.
STIMULASI NUMERASI PRAKONSEPTUAL ANAK USIA 4–5 TAHUN MELALUI GAME BERBASIS WEB UNTUK PENGENALAN JUMLAH DAN POLA BILANGAN Willson Mangoki; Anton Hermawan; Krismiyati; Hanita Yulia; Adriyanto Juliastomo Gundo; Rissal Efendi; Angela Atik Setiyanti; Charitas Fibriani; Yessica Nataliani; Erwien Christianto; Indrastanti Ratna Widiasari; Theophilus Wellem; Hendry; Dian Widiyanto Chandra; Danny Manongga
Jurnal DIMASTIK Vol. 4 No. 2 (2026): Juli
Publisher : Universitas Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26623/dimastik.v4i2.14113

Abstract

Kegiatan pengabdian kepada masyarakat ini bertujuan untuk mengenalkan konsep numerasi awal kepada anak usia 4–5 tahun melalui game berbasis web. Kegiatan dilaksanakan di TK Kristen 1 Satya Wacana Salatiga melalui tiga tahapan, yaitu persiapan, pelaksanaan, dan evaluasi. Tahap pelaksanaan dilakukan dalam dua sesi, yaitu pengenalan perangkat komputer dan pembelajaran numerasi menggunakan game berbasis web seperti Color by Number, Find the Number, Number Matching, Complete the Missing Number, dan Connect the Dots. Evaluasi dilakukan secara observasional dengan fokus pada keterlibatan anak, pengenalan perangkat komputer, dan pemahaman numerasi. Hasil menunjukkan bahwa anak memiliki antusiasme tinggi, mengenal perangkat komputer secara terbatas, serta lebih mudah memahami konsep angka melalui pendekatan gamifikasi. Pendampingan oleh guru dan mahasiswa berperan penting dalam keberhasilan kegiatan.
Co-Authors Adenia Kusuma Dayanthi Adriyanto Juliastomo Gundo Adyawangkara Katon Prasidya Alamsyah, Samuel Sandy Alfero Timothy Mundung Andeka Rocky Tanaamah Andhika Dwi Putra Bagaskara Suprapto Suprapto Andrian, Joshua Valens Angela Atik Setiyanti Antar Maramba Jawa Anton Hermawan Antonius Mbay Ndapamury Ardian Ariadi Ariel Rodjana Arya, William Cadwell Marthin Rumagit Chinta, Caroline Amanda Danny Manongga Desy Angeline Dian Novita Kristiyani Dian Widiyanto Chandra Diane Junianti Dimas Wahyu Eko Prasetyo Dody Agung Saputro Eldo, Steven Elvira Umar Emanuell Deftavalandra Rahmanto Endrick Fernando Suhono Erwien Christianto Febrian Joseph Laia Gandhi Alip Wijayanto Gloria Milenda Jesika Prima Gudiato, Candra Halim Yosephine Hanan Setyawan Hanita Yulia HARTONO, DAVID Hartono, Edwin Hendry Hindriyanto Dwi Purnomo Hiskia, Cheryl Louisa Loedwyca Indrastanti Ratna Widiasari Irawati, Susi Juseka, Christien Julio Kieky Adrian Sarwono Krismiyati Kurniawan, Restu Yoga Loppies, Marthin Wilheim Lumban Batu, Juliana Andretha Janet Mayer Jeloe Susilo Perdana Merryana Lestari Mira Mira Octavianus Dicky Wahyudi Panggabean, Albert Jonathan Prananing Mahanani Pratama, Nathan Putra Prima, Genaro Asa Puntoriza Puntoriza Putra, Marcellino Adi Ramba, Rileanly Masakke Ramos Somya Ravensca Matatula Raymond Elias Mauboy Rissal Efendi Sambadagni, Sabella Yasmin Silvia Yolanda Sastanti Somya Ramos Sri Yulianto Joko Prasetyo Stanny Dewanty Rehatta Stevanus Dwi Istiavan Mau Suryana, Steven Immanuel Sutrisno, Ezra Harfi T. Arie Setiawan Prasida Theopillus J. H. Wellem Triloka Mahesti Valentino Kevin Sitanayah Que Vinsensius Aprila Kore Dima Virginia, Mila Kavita Wata, Denis Christo Van Halen William Christanto Willson Mangoki Winsy Weku Winsy Weku Yerik Afrianto Singgalen Yerymia Alfa Susetyo Yessica Nataliani Yohannes Neman, Pius