The alumni information system plays a crucial role in maintaining communication between alumni and educational institutions. Currently, alumni data management at the Information Systems Study Program of UIN Sulthan Thaha Saifuddin Jambi is still conducted manually using Google Forms and WhatsApp groups, leading to difficulties in data recording and updates. Therefore, this research aims to develop a web-based alumni information system to enhance the efficiency of alumni data management, information dissemination, and communication between alumni and the institution. This study employs the Rapid Application Development (RAD) method, which consists of three main stages: requirement planning, system design, and implementation. The system was developed using the CodeIgniter framework and a MySQL database to ensure security and efficiency in alumni data management. The results of testing using the Black Box Testing method indicate that the system functions according to the designed specifications. Additionally, the results of the User Acceptance Testing (UAT) show that 96% the system is well accepted by users as it provides easy access to alumni information, job vacancies, as well as feedback and suggestions. This system is expected to strengthen the relationship between alumni and the institution while offering more effective and structured alumni data management.

MP BARBER is an exclusive barbershop for men located in Kedemangan Village, Muaro Jambi Regency. Customers have complained about the queues at MP BARBER, reflecting the direct impact of an unsatisfactory experience where customers feel uncomfortable. This situation highlights the importance of queue management and efforts to improve service efficiency, to maintain customer satisfaction and minimize the potential loss of customers in the future. Therefore, the researcher offers the design of an Android-based reservation information system for MP BARBER. The research uses a qualitative approach, the prototype development method, system design using UML, and is assisted by Corel Draw. The system design uses Android Studio, Visual Studio Code, and XAMPP as the database. System testing is carried out using the blackbox method and feasibility testing through 8 respondents, including the owner, employees, and customers of MP BARBER.