Modular Web-Based Development for English Test Using Testing System with Security and Automation Features

Abstract

An academic institution in Surabaya continues to administer the English Test named TEFL (Test of English as a Foreign Language) through Google Forms, a method now considered inadequate due to limitations in item management, automated scoring, and exam security. In response, this study developed a web-based TEFL examination system employing the Incremental Software Development Model. This model enables the stepwise implementation, testing, and refinement of system components, ensuring higher adaptability and control throughout the development process. The system integrates key features, including randomized question distribution, automated grading, multi-level user access (administrators, instructors, and students), real-time result display, and anti-cheating mechanisms such as tab-switch detection and user authentication. Functionality testing utilized the Black-box Testing approach to assess system

operations without accessing internal code. Additionally, system quality was evaluated using ISO 9126 standards

through a structured questionnaire involving 22 student participants. The system scored well across Functionality

(76.2%), Usability (79%), Reliability (77.2%), Efficiency (78.2%), and Portability (78.4%), with an overall average of

77.8%, placing it within the “Good” category. The results affirm the system’s effectiveness in enhancing the efficiency,

transparency, and integrity of online TEFL assessments.