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All Journal Jurnal Pengabdian Masyarakat (ABDIRA) Indonesian Journal of Innovation Science and Knowledge
Ridwan Sulistiyanto
Universitas Tangerang Raya
Aerospace Engineering Agriculture, Biological Sciences & Forestry Computer Science & IT Economics, Econometrics & Finance Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Nursing Social Sciences Other

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Sistem Pendukung Keputusan Estimasi Bahan Pewarna Aluminium Dengan Regresi Linier Berganda Ridwan Sulistiyanto; Amelia Sholikhaq; Ahmad Roihan
Indonesian Journal of Innovation Science and Knowledge Vol. 3 No. 3 (2026): IJISK 2026
Publisher : Fakultas Pendidikan Ilmu Keguruan, Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/ijisk.v3i3.478

Abstract

Penelitian ini bertujuan menerapkan Regresi Linier Berganda dalam Sistem Pendukung Keputusan untuk mengestimasi kebutuhan bahan pewarna aluminium pada Divisi Production Planning and Inventory Control (PPIC) PT. DA. Permasalahan penelitian berangkat dari proses estimasi manual yang masih mengandalkan perhitungan dan pengalaman staf sehingga cenderung menghasilkan over-estimation. Penelitian menggunakan pendekatan kuantitatif terapan dengan data 1.000 Job Order pada periode November 2022 sampai Oktober 2025. Variabel prediktor meliputi luas permukaan, ketebalan, jumlah produksi, jenis powder, warna powder, dan coverage rate, sedangkan pemakaian aktual menjadi variabel target. Variabel kategorikal diproses menggunakan one-hot encoding. Evaluasi model menggunakan MAE, RMSE, MAPE, R², dan 5-fold cross-validation. Model menghasilkan MAE 3,9304 kg, RMSE 5,3479 kg, MAPE 3,4808%, dan R² 0,9701. Pengujian pada 10 Job Order menghasilkan MAE 5,6912 kg, RMSE 6,5998 kg, dan MAPE 5,3761%, sedangkan metode manual menghasilkan MAPE 72,7088%. Hasil menunjukkan bahwa estimasi sistem lebih dekat terhadap pemakaian aktual dan menurunkan selisih estimasi pada data pengujian. Sistem desktop berbasis Python, PySide6, dan SQLite dapat digunakan sebagai alat bantu analitik bagi PPIC dalam menghasilkan estimasi yang lebih konsisten dan berbasis data historis.
Reflektor Jalan Baja Ringan: Intervensi Keselamatan Lalu Lintas di Desa Pasanggrahan Fikry Latukau; Ridwan Sulistiyanto; Hermawan Syah; Anisa Nurul Azizah
Jurnal Pengabdian Masyarakat (ABDIRA) Vol 6, No 1 (2026): Abdira, Januari
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/abdira.v6i1.1475

Abstract

The lack of lighting and the high potential for accidents at night on Argo Raya Street, Pasanggrahan Village, became the basis for implementing a simple road reflector installation program. This activity aims to provide effective visual guidance for road users at accident-prone points. The approach used includes field observation, reflector design using lightweight steel materials, installation at strategic locations, and post-installation visibility evaluation. The results indicate that the presence of reflectors significantly increases the driver's visibility range, clarifies the lane direction, and provides a longer reaction time in low-light conditions. The use of lightweight steel material has proven to be stable, resistant to weather changes, and easy to install, making it a practical solution for rural areas. This program received a positive response from local residents and contributed to increasing awareness regarding driving safety. Overall, this intervention is considered effective and feasible to be replicated in areas with similar characteristics.
Co-Authors Ahmad Roihan Amelia Sholikhaq Anisa Nurul Azizah Fikry Latukau Hermawan Syah