Web-Based Employee Leave Information System Design Using the Waterfall Method at the Deli Serdang District Agricultural Office

Student grading process is an important part of supporting the teaching and learning process in schools. However, at SMP Negeri 26 Seluma, the grading process is still done manually using Microsoft Word, which is prone to input errors, data duplication, and data loss. To address these issues, a web-based student grading information system was developed with the aim of improving efficiency, accuracy, and data security. The development method used is the Waterfall model, which includes the stages of requirements analysis, system design, implementation, testing, and maintenance. The system was built using PHP programming language, MySQL database, and supported by frontend technologies HTML and CSS. The result of this research is an information system capable of effectively managing student grading data, enabling homeroom teachers to enter and process grades, and providing students with access to view their grades independently through a web portal. The implementation of this system is expected to improve the efficiency of school staff and academic information transparency at SMP Negeri 26 Seluma

This research develops a web-based task management application to support the productivity of students and professionals. The Waterfall method is applied through the stages of requirements analysis, system design (DFD, ERD, CDM, PDM), implementation, testing, and maintenance. The system uses a database with three main entities (Users, Tasks, Schedule) that are integrated for data accuracy. The result is a responsive application with a simple interface that centralizes recording, sorting, and monitoring of tasks and schedules. All functions have been validated through Blackbox Testing and operate according to specifications. This application effectively manages academic and personal activities in one platform and has the potential to form the basis for developing more complex productivity systems in the future.

This study discusses the design and development of a web-based alumni data management information system at STMIK Widuri. The rapid development of information technology has encouraged educational institutions to improve the quality of information services and data management systems. One of the important data that must be managed properly by universities is alumni data, which is useful for administrative needs, accreditation, tracer study activities, and communication between the institution and alumni. However, the alumni data management process at STMIK Widuri is still carried out manually, causing several problems such as difficulties in data searching, delays in report generation, data duplication, and the risk of data loss. This research aims to develop a web-based information system that can facilitate alumni data processing, updating, searching, and reporting activities effectively and efficiently. The research method used in this study is the Waterfall method, which consists of requirement analysis, system design, implementation, testing, and maintenance stages. The system was developed using PHP as the programming language and MySQL as the database management system. The results of this study indicate that the developed system can improve the effectiveness and efficiency of alumni data management, simplify data processing activities, improve data accuracy, and provide easier access to information for administrators and alumni through an online platform.

KSU Berlian in Probolinggo City, serving 720 members, still relies on a manual system for managing credit transactions, resulting in process inefficiencies, low data security, and a high rate of non-performing loans (NPL) reaching 15% in 2024. This study aims to design and implement a web-based credit application submission system using the Laravel framework to address these issues. The system was developed using the Waterfall methodology, which includes requirements analysis, system design, coding, testing, implementation, and maintenance stages. The application development utilized Laravel Framework, MySQL Database, PHP, and Bootstrap CSS. The system is equipped with key features such as online credit application submission, due date notifications via WhatsApp, and integrated data management tailored specifically for KSU Berlian. System testing was conducted using blackbox testing and User Acceptance Testing (UAT), which yielded excellent results with a user satisfaction rate of 82.78%. The research findings indicate that the application significantly improves data management efficiency, reduces physical document usage, facilitates remote customer access, and assists management in monitoring and decision-making processes. Furthermore, the application helps minimize non-performing loans through enhanced monitoring and communication systems.

This study focuses on the development of an interactive website designed to function as an information and product ordering medium for Raja Konveksi Engineering Aceh MSME. This research was conducted in response to the absence of an official online platform, where promotional activities and product orders were previously handled manually through photo sharing and direct communication, resulting in limited efficiency and reach. The system was developed using the Waterfall method, encompassing requirement analysis, system design, implementation, testing, and maintenance stages. The website was built using PHP with the CodeIgniter framework, supported by a MySQL database, and integrated with HTML, CSS, JavaScript, and Bootstrap to enhance interactivity and responsiveness. System evaluation was carried out through a user satisfaction questionnaire involving 25 respondents. The findings indicate a satisfaction rate of 95.52%, categorized as very high. This result demonstrates that the developed website effectively supports information delivery and online product ordering. The implementation of this system is expected to strengthen digital promotion, broaden market access, and improve the efficiency of the ordering process for Raja Konveksi Engineering Aceh.

This research aims to develop a web-based e-learning application at Sekolah Dasar Masehi Tanggaba by applying the Waterfall software development model. The background of this study stems from the need for interactive, flexible, and easily accessible learning media in the digital era, considering that conventional face-to-face methods are still predominantly used in schools. The Waterfall model was chosen because it provides a systematic workflow through the stages of requirements analysis, system design, implementation, testing, and maintenance. Data collection was carried out through observations, teacher interviews, and documentation studies to identify the actual needs of users.The results of this study produced an e-learning application with key features, including learning material management, interactive quizzes, discussion forums, and automated assessment. Teachers can upload structured materials and assignments, while students can access learning content, complete exercises, and interact through forums more flexibly. System testing was conducted using the black box method to ensure that each function runs according to user requirements and specifications. Based on the testing results, the application was proven to function properly, be practical to use, and effective in supporting the learning process. Teachers found it helpful in managing materials and assignments, while students experienced more independent and interactive learning that was not limited to the classroom. Therefore, the developed e-learning application can be considered valid, practical, and effective as a supporting learning medium in elementary schools and has the potential to improve learning quality in the digital era.

Rapid developments in information technology have encouraged many educational institutions to implement digital systems for data management. SDN 042 North Bengkulu previously used Microsoft Excel to record student data, but this method was inefficient and prone to errors, especially with the increasing number of students. The purpose of this study was to create a web-based information system using PHP and MySQL, which is expected to improve efficiency, accuracy, and security in student data management. The method used in developing the system was the waterfall method, with stages of requirements analysis, system design, code writing, testing, and implementation and maintenance. The result of this research is a student data information system developed for SD N 042 North Bengkulu that successfully meets the school's administrative needs effectively. This system facilitates online recording, searching, and reporting of student data. Because it is web-based, this system can be accessed at any time from various devices and is proven to be more practical than the previous manual method

The management of Sumbangan Pembinaan Pendidikan (SPP) payments in Islamic boarding schools still faces issues related to delayed recording, data inaccuracies, and weak access control over financial information. This study aims to design and implement a web-based SPP payment information system that applies Role-Based Access Control (RBAC) to improve administrative order and data security. The system was developed using the Waterfall method, which consists of requirement analysis, system design, implementation, testing, and maintenance stages. The application was built using the Laravel framework with RBAC implemented at the middleware level to manage user access based on defined roles, namely Super Admin, Treasurer, Student Guardian, and Principal. System testing was conducted using the Black-Box Testing method to validate core functionalities, including user authentication, billing management, payment verification, report generation, and role-based access restrictions. The test results indicate that all system functions operate as expected and that the RBAC mechanism effectively prevents unauthorized access to sensitive features and data. Overall, the implemented system supports more structured payment administration, improves data accuracy, and enhances security and accountability in managing financial transactions within the pesantren environment.

<p><strong>Effective inventory management is essential to maintain stock availability and control inventory costs in distribution companies. PT Panasonic Gobel Indonesia, Medan Branch, still faces challenges due to non-integrated inventory recording, resulting in data inconsistencies, reporting delays, and difficulties in determining optimal order quantities. These issues increase the risk of stock shortages and excess inventory, highlighting the need for an integrated inventory management information system. This study aims to design and develop a web-based inventory management system using the Safety Stock and Economic Order Quantity (EOQ) methods. The research applies a Research and Development (R&D) approach with the Waterfall model, covering requirement analysis, system design, implementation, and testing stages. Data were collected through observation, interviews, and literature review. The system was developed using PHP with the Laravel framework, a MySQL database, and UML. Model validation was conducted by comparing system calculation results with manual theoretical calculations, while verification was performed through functional and user acceptance testing. The results show that the system can accurately record inventory data, monitor stock levels in real time, and automatically calculate EOQ and safety stock, thereby supporting efficient and optimal inventory control.</strong></p><p><strong><em>Keywords</em></strong> - <em>Economic Order Quantity (EOQ); Inventory Control; Inventory Management Information System; Safety Stock; Web-Based System</em><em></em></p>

This study aims to develop a web-based e-learning system at SMA XYZ as a solution to address several problems, including limited access to learning materials, lack of interaction between teachers and students, and low administrative efficiency due to manual processes. The research employs the Waterfall development method, consisting of requirement analysis, system design, implementation, testing, and maintenance stages. The system design is based on the educational information system theory and the User-Centered Design (UCD) approach to create an intuitive and user-friendly interface tailored to user needs. Modeling tools such as Use Case Diagrams and Class Diagrams are used to map user interactions and data structures. The results show that the e-learning system developed using PHP and MySQL functions effectively, as demonstrated by functional testing (black box testing), which confirmed that all system features operate as intended. The system successfully enhances learning effectiveness, improves administrative efficiency, and strengthens teacher–student interaction in an online environment. Therefore, this web-based e-learning system is considered feasible to be implemented as a digital learning medium at SMA XYZ and has potential for further development through the integration of learning analytics features.

The development of information technology encourages Micro, Small, and Medium Enterprises (MSMEs) to adapt to digital-based sales systems. Mandiri Furniture, as one of the MSMEs in the furniture sector, still faces problems in the marketing process, product ordering, and sales data management that are still carried out conventionally, resulting in low efficiency and limited market reach. This study aims to develop an Android-based e-commerce application that can increase sales efficiency and provide system convenience for users and admins. The research method used is the Software Development Life Cycle (SDLC) with the Waterfall model, which includes the stages of requirements analysis, system design, implementation, testing, and maintenance. The application was developed using the Flutter framework, MySQL database, and PHP as a link between the application and the server. Application Programming Interface (API) integration was carried out to support system functionality, including Stripe as a payment service, RajaOngkir for shipping cost calculations, and Imgur for uploading product images. System testing was carried out using the Blackbox Testing method and showed that all application features ran well on several tested Android devices. The results showed that the application was able to increase the efficiency of the sales process and ease of use of the system with a performance level of 75%. The implications of this research are expected to be a digital solution for MSMEs in increasing competitiveness, expanding market reach, and optimizing sales data management in an integrated manner

One of the public elementary schools in Medan is SDN 064017. At SDN 064017, the procedure for processing student grade data is not yet computerized. Gradebooks are used to track and process student grade information. There are still certain problems that arise with this method. SDN 064017 requires a lot of time and effort to process and find information on student grades. The purpose of the author's research is to develop a mobile-based application that will simplify and speed up SDN 064017 in processing and searching for student grade data. The system development method used by the author is the waterfall method, consisting of requirements analysis, system design, implementation, testing, deployment, and maintenance stages, while the system testing method uses the black box testing method. In the process of developing a mobile-based application, the author uses the Kodular framework and the Airtable database. With the information system, it is hoped that it can help SDN 064017 in processing and searching student grade data at SDN 064017 to be more effective and efficient through an Android mobile.

The increasing number of students in Islamic boarding schools (pesantren) has made administrative tasks such as recording student violations, achievements, permissions, and health records more complex. Many schools still manage these data manually, resulting in duplication, delayed communication, and inefficient supervision. This study addresses this issue by developing a Web-Based Santri Management and Monitoring System integrated with WhatsApp, aiming to streamline data management and enhance real-time communication between administrators, guardians, and health staff. The system was developed using the Waterfall methodology, which includes requirement analysis, system design, implementation, testing, and maintenance stages. Three main user roles were defined: administrators, guardians, and health staff, each with specific responsibilities. A User Acceptance Test (UAT) was conducted with 32 respondents, including one administrator, 30 guardians, and one health staff. The results showed satisfaction levels of 100% for administrators, 87% for guardians, and 100% for health staff, indicating high user acceptance. These findings suggest that the system effectively addresses the challenges of manual data management, improves administrative efficiency, and strengthens communication through real-time WhatsApp notifications, providing a comprehensive solution for student monitoring and supervision in Islamic boarding schools.

The Deli Serdang District Prosecutor's Branch is a government institution that exercises state power in the field of prosecution and authority. At the Prosecutor's Office, recording expenses is still done manually, so this is less efficient. Therefore, the Deli Serdang District Prosecutor's Office requires an effective and efficient system for financial management. The aim of the research is to simplify web-based financial recording at the Deli Serdang District Prosecutor's Office in order to increase efficiency, transparency and accuracy. In this research, the waterfall method is used. This waterfall method includes the stages of system requirements analysis, system design, implementation, testing and maintenance. The results of the research, namely the output on the report page, prove that the system is running well and the testing stage of the Money Recording Application was carried out using the Black Box testing method. From the test results, the system runs well so that the web-based money recording application can be used.

The Seminary of St. Paul Kentungan faces challenges in managing its book collection and circulation process manually. This manual system leads to inefficiency and difficulties in searching for information. This research aims to develop a web-based library information system to address these problems. The system is built using the Laravel framework, Blade template, and MySQL database. This research uses the waterfall system development method with the stages of requirements analysis, system design, system implementation, and system testing. Data was collected through observation, interviews, and literature studies.The research results show that the web-based library information system has been successfully built and tested. Testing shows that the system is easy to understand and use by users. This system can help the seminary manage book data, members, carry out the book circulation process, send email notifications, and display or print reports from book circulation process activities transparently. Perpustakaan Seminari Tinggi Santo Paulus Kentungan menghadapi kendala dalam pengelolaan koleksi buku dan proses sirkulasi buku secara manual. Sistem manual ini menimbulkan inefisiensi dan kesulitan dalam pencarian informasi. Penelitian ini bertujuan untuk membangun sistem informasi perpustakaan berbasis website guna mengatasi permasalahan tersebut. Sistem ini dibangun menggunakan framework Laravel, blade template, dan database MySQL.Penelitian ini menggunakan metode pengembangan sistem waterfall dengan tahapan analisis kebutuhan, desain sistem, implementasi sistem, dan pengujian sistem. Data dikumpulkan melalui observasi, wawancara, dan studi literatur.Hasil penelitian menunjukkan bahwa sistem informasi perpustakaan berbasis website berhasil dibangun dan diuji. Pengujian menunjukkan bahwa sistem ini mudah dipahami dan digunakan oleh pengguna. Sistem ini dapat membantu seminari dalam mengelola data buku, member, melakukan proses sirkulasi buku, mengirimkan e-mail notifikasi, dan menampilkan atau mencetak laporan dari aktivitas proses sirkulasi buku secara transparan.