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All Journal Seminar Nasional Aplikasi Teknologi Informasi (SNATI) TEKNOLOGI INFORMASI POSITIF SMATIKA Jurnal Ilmiah KOMPUTASI Edu Komputika Journal Sistemasi: Jurnal Sistem Informasi JOIV : International Journal on Informatics Visualization Sinkron : Jurnal dan Penelitian Teknik Informatika JIEET (Journal of Information Engineering and Educational Technology) JEEMECS (Journal of Electrical Engineering, Mechatronic and Computer Science) SENTIA 2016 Jurnal Pengabdian Polinema Kepada Masyarakat Jurnal Nasional Teknik Elektro dan Teknologi Informasi Jurnal Informatika Polinema (JIP) Jurnal Informatika: Jurnal Pengembangan IT Jurnal Pengabdian Kepada Masyarakat
Rosiani, Ulla Delfana
Jurusan Teknologi Informasi, Program Studi Teknik Informatika, Politeknik Negeri Malang, Indonesia
Humanities Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Languange, Linguistic, Communication & Media Library & Information Science Social Sciences Other

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Application of Double Exponential Smoothing Method for Forecasting Laptop Sales Nurhayati, Rafika; Yusron, Rizqi Darma Rusdiyan; Sabilla, Wilda Imama; Rosiani, Ulla Delfana
Sistemasi: Jurnal Sistem Informasi Vol 14, No 1 (2025): Sistemasi: Jurnal Sistem Informasi
Publisher : Program Studi Sistem Informasi Fakultas Teknik dan Ilmu Komputer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32520/stmsi.v14i1.4368

Abstract

PT Indo Bismar is a retail company focused on laptop sales. The company experiences fluctuations in laptop sales each month, which impacts inventory management as it becomes challenging to predict demand accurately. Consequently, PT Indo Bismar faces financial losses due to unsold laptops. To address this issue, a sales forecasting system has been designed to optimize inventory management more effectively and efficiently.This study applies the double exponential smoothing method to forecast laptop sales and uses the Mean Absolute Percentage Error (MAPE) to measure forecasting accuracy. The double exponential smoothing method was tested through a trial-and-error approach. This process produced varying alpha and beta values for different laptop brands and models. It involved repeated iterations to test each combination until the optimal values that yielded the best forecasting accuracy were identified. After obtaining the MAPE results through the trial-and-error approach, the average system MAPE was calculated to evaluate the overall accuracy of the system, resulting in 16.58%. This indicates that the sales forecasting system demonstrates good accuracy, as the error rate falls within the range of 10% to 20%. Therefore, the use of the double exponential smoothing method can assist PT Indo Bismar in managing inventory and making strategic decisions for future laptop sales
INTEGRATED ROLE MODEL PENGOLAHAN SUSU MENJADI KEJU DENGAN APLIKASI PERHITUNGAN PRODUKSI Irfin, Zakijah; Hidayatinnisa, Nurul; Chrisnandari, Rosita Dwi; Rosiani, Ulla Delfana; Rulianah, Sri
Jurnal Pengabdian kepada Masyarakat Vol. 11 No. 2 (2024): JURNAL PENGABDIAN KEPADA MASYARAKAT 2024
Publisher : P3M Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/abdimas.v11i2.5412

Abstract

The purpose of this community service is to integrate a zero-waste model for processing milk into cheese with a production calculation application at KU Mustarika Jaya Makmur Ngantang. This project aims to address several key issues faced by the cooperative, such as unstandardized milk quality, lack of product diversification, and insufficient economic analysis of dairy products. By implementing supply chain management practices, conducting comprehensive training sessions, and developing a digital application for production calculations, the project seeks to enhance the cooperative's operational efficiency and product quality. The results of the project demonstrate a significant improvement in the cooperative members' knowledge and skills in supply chain management, cheese production techniques, and economic analysis. The integration of a zero-waste model has led to more efficient use of resources and reduced waste, contributing to environmental sustainability. The production calculation application has provided the cooperative with valuable insights into cost management and profitability, facilitating more informed business decisions. Overall, this community service initiative has successfully enhanced the operational, leading to increased productivity, better product quality, and improved economic outcomes for the cooperative members.
Sistem Manajemen Pengungsi Guna Meningkatkan Efektivitas Operasional BPBD Kota Batu Dalam Pendataan Dan Pemantauan Pengungsi Ardiansyah, Muhammad Rizqi; Rosiani, Ulla Delfana; Yunhasnawa, Yoppy
Jurnal Informatika: Jurnal Pengembangan IT Vol 10, No 1 (2025)
Publisher : Politeknik Harapan Bersama

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30591/jpit.v10i1.7488

Abstract

Batu City is a region known for its natural beauty but also faces high risks of natural disasters such as landslides, earthquakes, and floods. The primary challenge faced by the Regional Disaster Management Agency (BPBD) of Batu City is the manual processing of refugee data. In emergency situations, such as post-disaster scenarios, time is crucial, and manual data collection, processing, and reporting can hinder the rapid response needed to assist refugees. Additionally, data mismatches and inaccuracies in logistics and kitchen needs pose serious problems. Therefore, there is a need for a refugee management information system to enhance the operational effectiveness of BPBD Batu City in data processing, real-time data monitoring, and ensuring the accuracy of logistics and kitchen needs data. This study employs a combination of design thinking and the spiral method for system development. Based on testing the impact of the application on BPBD's response showed an increase in response speed by 87.1%. This proves that the implemented system effectively enhances BPBD Batu's operational efficiency in refugee data collection and monitoring.
Co-Authors Adi Atmoko Agung Nugroho Pramudhita Agung, Muhammad Helmi Permana Al Hazmi, Moch. Fariz Andjani, Bella Sita Ardiansyah, Muhammad Rizqi Arie Rachmad Syulistyo Aryo Bagus Kusumadewa Tutuko Astiningrum, Mungki Astuti, Ely Setyo Atika Prasetyawati Aulia Zahra Musthafawi Baqi, Rijalul Batubulan, Kadek Suarjuna Bella Sita Andjani Cadea Mikha Pasma Choirina, Priska Choirina, Priska Chrisnandari, Rosita Dwi Dyah Ayu Irawati Eka Larasati Amalia Elisiana, Malia Fadlilah, Afi Fadlullah, Faqih Faisal Rahutomo Faqih Fadlullah Fitri Maharany Fitriani, Indah Martha Frangky Tupamahu Gunawan Budi Prasetyo Hidayatinnisa, Nurul Ibnu Tsalis Assalam Irfin, Zakijah Khosyi Nasywa Imanda Krista Bella Dwi Rahayu Nur Widyasari Luthfansa, Zaky Maula Malia Elisiana Marcelina Alifia Rahmawati Maula, Ahmad Zaky Maulana Syarief Hidayatullah Moch. Fariz Al Hazmi Mustika Mentari Nadhifatul Laeily Nor Wahid Hidayad Ulloh Nugraha W, Raphael Nur Afifi, Yunis Fiatin Nurhayati, Rafika Nurudin Santoso P., Mauridhy Hery Pasma, Cadea Mikha Permatasari, Twisty Henras Prasetyawati, Atika Putra Prima Arhandi, Putra Prima Putra, Rahardhiyan Wahyu Qonitatul Hasanah Rahardhiyan Wahyu Putra Rahmad, Cahya Raphael Nugraha W Rosa Andrie Asmara Rosa Andrie Asmara Rudy Ariyanto Rudy Ariyanto Santoso, Nurudin Septiar Enggar Sukmana Shoumi, Milyun Ni’ma Siti Romlah Siti Romlah Sri Rulianah, Sri Surya Sumpeno Twisty Henras Permatasari Vandry Eko Haris Setiyanto Wilda Imama Sabilla, Wilda Imama Yessy Nindi Pratiwi Pratiwi Yoppy Yunhasnawa Yunhasnawa, Yoppy Yushintia Pramitarini Yusron, Rizqi Darma Rusdiyan Zaky Maula Luthfansa