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All Journal Infotech: Journal of Technology Information
Francka Sakti Lee
Sistem Informasi, Universitas Bunda Mulia, Jakarta
Computer Science & IT

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PENGEMBANGAN APLIKASI REMINDER ONLINE PAYMENT KOST BERBASIS MOBILE Yemima Monica Geasela; Kevin Christianto; Francka Sakti Lee; Fidelia Novena Doa; Angie Wiyani Putri
Infotech: Journal of Technology Information Vol 11, No 2 (2025): NOVEMBER
Publisher : ISTEK WIDURI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37365/jti.v11i2.571

Abstract

The advancement of mobile technology provides opportunities for digital transformation in small-scale property businesses, including boarding house (kost) management. This research focuses on developing a Mobile-Based Reminder Online Payment Application for Kost using the Mobile Application Development Life Cycle (MADLC) method. The application is designed to automate payment processes through a virtual account system and provide real-time reminder notifications for both tenants and owners.The development stages included requirement identification, system design using UML diagrams, database structuring with MySQL, and interface implementation. The testing process employed User Acceptance Testing (UAT) to validate system functionality and user satisfaction. The results show that users successfully received automatic payment notifications based on the configured due dates, and all online payment transactions were accurately recorded in the system database without errors. This study concludes that the MADLC approach effectively supports the structured development of mobile applications for digital payment and reminder management in boarding houses. The UAT results confirm that the application meets user expectations in terms of functionality, ease of use, and transaction accuracy.
PENINGKATAN PERFORMA MODEL MACHINE LEARNING UNTUK DETEKSI DINI POLYCYSTIC OVARY SYNDROME MELALUI KOMBINASI METODE PREPROCESSING Ahya Radiatul Kamila; Francka Sakti Lee; Johanes Fernandes Andry
Infotech: Journal of Technology Information Vol 11, No 2 (2025): NOVEMBER
Publisher : ISTEK WIDURI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37365/jti.v11i2.448

Abstract

Polycystic Ovary Syndrome (PCOS) is one of the most common hormonal disorders experienced by women of reproductive age and can lead to various health problems, including menstrual irregularities, infertility, and an increased risk of metabolic diseases. Early detection of PCOS is essential to minimize long-term impacts and improve the quality of life for patients. This study aims to identify effective data preprocessing strategies to enhance the performance of classification models for PCOS detection. The dataset used is open source, consisting of 541 participants with 45 clinical and laboratory features. The main challenges encountered include the presence of many missing values, an imbalanced target class distribution, and a large number of independent features. To address these issues, a series of preprocessing steps were applied, including missing value imputation, data balancing using the Synthetic Minority Over-sampling Technique (SMOTE), and dimensionality reduction using Principal Component Analysis (PCA). A classification model was built using the Random Forest algorithm, and its performance was compared before and after applying PCA. The evaluation results show that before PCA, the model achieved an accuracy of 87.5%, precision of 86%, recall of 86%, and an F1-score of 86%. After applying PCA, performance improved to an accuracy of 90%, precision of 89%, recall of 89%, and an F1-score of 89%. These findings indicate that the right combination of preprocessing strategies, particularly SMOTE and PCA, can significantly improve the efficiency and effectiveness of models in detecting PCOS, thereby supporting the development of more reliable medical decision support systems.
RANCANG BANGUN APLIKASI INVENTORI DENGAN METODE PULL INVENTORY PADA PERUSAHAAN PERANGKAT JARINGAN Martinez Nicholas; Francka Sakti Lee
Infotech: Journal of Technology Information Vol 11, No 2 (2025): NOVEMBER
Publisher : ISTEK WIDURI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37365/jti.v11i2.564

Abstract

A network equipment company specializing in the provision of switches and servers still faces challenges in stock management because the recording of outgoing goods and inventory withdrawal transactions is still done manually using notebooks and Excel. This condition causes problems such as delays in data updates, difficulties in monitoring stock availability in real time, and the risk of discrepancies between data and conditions in the warehouse. The objective of this research is to design and implement a web-based inventory application using a pull inventory approach, where stock is recorded only upon actual demand from projects or customers. This strategy helps reduce the likelihood of overstocking or understocking. Based on testing results, the developed application can support the recording of outgoing goods, provide real-time availability information, and generate useful reports for management, thereby supporting the efficiency, accuracy, and integration of the company's business processes.
ANALISIS TATA KELOLA SERVICE DESIGN PERUSAHAAN STARTUP MENGGUNAKAN FRAMEWORK ITIL V3 Yunianto Purnomo; Honni Honni; Yanthi Carolina; Francka Sakti Lee; Byron Harnope; Kevin Tanuwidjaya
Infotech: Journal of Technology Information Vol 12, No 1 (2026): JUNI
Publisher : ISTEK WIDURI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37365/jti.v12i1.613

Abstract

Information technology plays a strategic role in supporting business sustainability and enhancing value creation in startup companies. To ensure optimal service quality, structured and standardized IT service governance is required, one of which can be implemented using the ITIL V3 framework. The Service Design domain in ITIL V3 focuses on designing IT services, including infrastructure, architecture, processes, and policies that support service quality. This study aims to analyze IT service governance within the Service Design domain in a startup company, with a specific focus on the Capacity Management subdomain. This research adopts a qualitative case study approach, with data collected through semi-structured interviews involving relevant stakeholders. Data analysis is conducted by comparing the existing organizational practices with ITIL V3 best practices using a gap analysis method. The results indicate that the implementation of Capacity Management has not been fully optimized, particularly in terms of capacity planning, performance monitoring, and process documentation. This study provides strategic recommendations to improve alignment with ITIL V3 standards, thereby enhancing IT service quality and operational efficiency in startup environments.
REDESAIN WEBSITE E-COMMERCE PADA PERUSAHAAN PENJUALAN KOPI MENGGUNAKAN METODE WATERFALL Lina Noviana; Francka Sakti Lee
Infotech: Journal of Technology Information Vol 12, No 1 (2026): JUNI
Publisher : ISTEK WIDURI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37365/jti.v12i1.614

Abstract

Previously, the company’s website functioned only as a static company profile and was unable to facilitate online sales transactions. This limitation affected market expansion opportunities and reduced the efficiency of sales data management. This study aimed to redesign the website interface and develop an e-commerce system to address these issues. The research applied the waterfall method, which consists of the analysis, design, implementation, testing, and final system stages. The result of this development is an integrated e-commerce website that supports independent customer transactions, including product exploration, shopping cart management, checkout, payment processing, and order tracking. Based on the conducted testing and user evaluation, the developed system was able to operate properly and support digital transaction activities more effectively. The redesign of the website successfully transformed the company profile platform into a functional e-commerce system that is more interactive and structured.
Co-Authors Ahya Radiatul Kamila Angie Wiyani Putri Byron Harnope Fidelia Novena Doa Honni Honni Johanes Fernandes Andry Kevin Christianto Kevin Tanuwidjaya Lina Noviana Martinez Nicholas Yanthi Carolina Yemima Monica Geasela Yunianto Purnomo