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In the current digital era, managing sales transactions manually is inefficient and prone to recording errors. This research aims to develop a web-based Point of Sale (POS) application for the Phi Phi Thai business using the Extreme Programming (XP) software development methodology. XP was chosen for its support of rapid iteration, adaptability to changing user requirements, and strong collaboration between developers and stakeholders. The developed application includes key features such as user registration and login, product ordering, menu and customer management, expense tracking, and financial and sales reporting. Testing was conducted using the Black Box Testing method to ensure that all functionalities performed according to specifications. The implementation results indicate that the application improves operational efficiency, reduces transaction errors, and provides real-time information for business owners to support better decision-making. Furthermore, the application of Extreme Programming (XP) methodology in the development process allows time for regular evaluation and refinement of the application based on feedback from end users. Each iteration produces a version of the software that can be immediately tested and used, minimizing the risk of system failure during final implementation. This approach also encourages lightweight yet relevant documentation and open communication between the technical team and business owners. Thus, the developed Point of Sale application not only meets current functional requirements but also has a high degree of flexibility for further development as Phi Phi Thai's business grows in the future.

The study presents a comprehensive framework for optimizing customer retention budget by integrating clustering, classification, and mathematical optimization techniques. The study begins with the IBM Telco dataset, which is prepared through data cleansing, encoding, and scaling.  In the preliminary phase, customer segmentation is performed using K-Means clustering, with k = 3 and k = 4 identified as optimal based on the elbow method and Silhouette score. The configurations produced three (Premium, Standard, Low) and four (Premium, Standard Plus, Standard, Low) customer segments based on purchase preferences, which served as input features for churn prediction. In the second phase, the dataset was divided into training and test sets in an 80:20 ratio, followed by data balancing using the Synthetic Minority Over-sampling Technique (SMOTE) and Edited Nearest Neighbors (ENN). Multiple classification algorithms were evaluated, including Naive Bayes (NB), Random Forest (RF), Categorical Boosting (CatBoost), Light Gradient Boosting Machine (LightGBM), Extreme Gradient Boosting (XGBoost), Gradient Boosting (GB), Support Vector Machine (SVM), Logistic Regression (LR), K-Nearest Neighbors (KNN), and Multi-Layer Perceptron (MLP) using F1-score as the performance metric. CatBoost and LightGBM, with k values of 3 and 4, respectively, were the highest-performing classification models, with only minimal differences in performance.    Ultimately, customer segmentation established customer prioritization, whereas churn prediction assessed customer churn likelihood. Four distinct configurations were assessed utilizing mixed-integer linear programming (MILP) to optimise retention budget allocation within uniform budget constraints, discount amounts, and churn thresholds. In both the k=3 and k=4 scenarios, CatBoost surpassed LightGBM, with CatBoost at K=3 effectively discounting 66% of at-risk consumers across all three segments, hence improving the intervention's efficacy and budget allocation, making it the ideal choice for maximizing customer retention. The results demonstrate the importance of segmentation in enhancing retention budgeting and budget optimization, particularly concerning parameter sensitivity.

The advancement of information technology has encouraged companies to enhance operational efficiency through computerized systems, particularly in human resource management. PT Volar Mekanikal Teknologi x Luminous Creation faces challenges in manual attendance recording, unsystematic leave management, and a payroll system that lacks integration. Therefore, this study aims to design and implement a web-based Employee Management Information System using the Extreme Programming (XP) methodology. The system focuses on three main features: attendance tracking using GPS and selfie verification, online leave applications, and automated payroll calculation integrated with attendance data. The system development process includes planning, design using Unified Modeling Language (UML), coding with the Laravel framework and MySQL database, and testing through the Black-Box method. The implementation results show that the system effectively improves efficiency and accuracy in employee management, while also supporting the company’s operational activities in a more professional and structured manner.  

This research employs a Systematic Literature Review (SLR) approach to analyze the application of the simplex method as a tool for solving real-world optimization problems. Mathematics education plays a crucial role in developing critical thinking and achieving accurate results. Linear programming, with its highly effective simplex method, is a branch of mathematics proven to solve various optimization challenges such as cost minimization, profit maximization, distribution, and scheduling. In practice, the simplex method is an alternative algorithm that systematically searches for the optimal solution to problems by moving from one feasible solution to another until the best result is achieved. This study identifies, examines, evaluates, and interprets relevant studies on the simplex method's application in real-world contexts. Our review of 20 journals reveals that the simplex method is highly effective in solving a wide range of optimization problems, from large-scale industries to Micro, Small, and Medium Enterprises (MSMEs). Examples of its application include optimizing fish feed costs at PT. Indojaya Agrinusa, maximizing profits for Seblak MSMEs, determining optimal sales quantities for areca nuts, and optimizing the production of tofu and pottery crafts, among others. The simplex method's ability to consider various limiting factors has proven to be extremely helpful.

Skincare Distributor Sr12 is a Distributor that provides herbal beauty products from PT. SR12 Herbal Perkasa. PT. SR12 Herbal Perkasa is a company engaged in the field of herbal & skin care which was established in 2015 by Toni Firmansyah, S. Farm., Apt as the main director, Asrianty Salam, S.Farm as a pharmacist who is responsible for Plant Operational. The Sr12 Distributor Store requires more active and wider marketing to increase sales. To improve marketing, an information system is needed that can make it easier for consumers to find information about product information and marketing of sr12 products. One of the media that is widely used in marketing is a website. A website is a collection of addresses that display interrelated information in the form of text, images, videos, animations, sounds or a combination of all of them that can be accessed using the internet. To build a website, a method is needed. Personal Extreme Programing (PXP) is a software development method that tries to simplify the various stages in the development process so that it becomes more addictive and flexible. Keywords: Information systems, single level, Personal Extreme Programming (PXP)

Technology that develops very rapidly brings many changes, especially in the development of medical records in hospitals that are increasing. Electronic medical records bring many benefits, one of which is improving the quality of services in hospitals. The medical records used at Hermina Arcamanik Hospital are mostly electronic-based, including reporting. However, problems were found in the medical record installation, namely, there were several reports that had not been managed optimally. This is because reporting still uses google spreadsheets which requires data to be moved manually one by one, so it takes a long time, and the quality of reporting becomes less accurate. A real example of this problem can be seen in the process of reporting patient Mortalitys. Meanwhile, accurate and systematic reporting of Mortality data is essential in supporting decision-making in hospitals. Therefore, the design of a patient Mortality reporting information system is urgently needed to make time efficient and improve the quality of reports. The method used in designing this system is extreme programming and web-based. The results of this information system design are able to shorten the time to make Mortality reports and can produce accurate data

This literature review discusses the application of Agile methodology in modern software development. Agile offers a flexible, iterative approach that contrasts with traditional waterfall models. The objective of this study is to provide insights into how Agile frameworks such as Scrum, Kanban, and Extreme Programming have influenced development speed, software quality, and team collaboration. Methodologically, the study synthesizes findings from recent academic and industrial literature from the last five years. The results show that Agile enhances adaptability and customer satisfaction, although challenges remain in large-scale implementations.  

Perpustakaan di Jurusan Manajemen Informatika Politeknik Negeri masih menggunakan sistem manual termasuk pencatatan proses peminjaman, pengembalian dan pendataan, hal ini menimbulkan beberapa permasalahan yaitu pengarsipan menjadi tidak teratur dan berantakan. Tujuan penelitian ini adalah  mengembangkan sistem informasi perpustakaan Jurusan manajemen Informatika (PUSTAKA MI) sebagai solusi untuk mengatasi tantangan dalam pengelolaan perpustakaan secara manual dengan menggunakan model Extreme Programming (XP) dalam pengembangannya. XP mengacu pada empat tahapan utama: perencanaan, perancangan, pengkodean, dan pengujian. Perencanaan melibatkan identifikasi masalah, analisis kebutuhan, dan penjadwalan. Perancangan meliputi pemodelan sistem, arsitektur, dan basis data. Tahap pengkodean dilakukan menggunakan PHP dan MySQL, pengujian dilakukan dengan metode blackbox testing.  Berdasarkan hasil Pengujian Sistem black box testing menggunakan teknik Equivalence partition menujukkan seluruh Fungsional sistem bernilai valid yang berarti bahwa sistem telah berjalan dengan baik secara fungsional. Pengujian terhadap kepuasan  pengguna menunjukkan respon positif, dengan skor tinggi dengan nilai rata-rata 4,52 menggunakan skala likert. Hasil penelitian ini menunjukkan bahwa metode Extreme Programming dapat diterapkan secara efektif dalam pengembangan sistem informasi perpustakaan, memberikan solusi inovatif dalam pengelolaan dan penelusuran koleksi yang lebih reliabel.

Construction management is vital for coordinating and overseeing projects to ensure alignment with planned objectives. Factors such as time, cost, and quality demand strict control, as discrepancies between initial plans and actual execution can cause significant challenges. In ship construction, delays in material execution and delivery are frequent bottlenecks, leading to schedule disruptions and negatively affecting project outcomes. Addressing these issues requires effective management and robust risk mitigation strategies. This study proposes a web-based ship construction project monitoring system using the Laravel framework and MySQL database. The system is developed using Extreme Programming (XP), an agile methodology that emphasizes iterative improvement, stakeholder collaboration, and adaptability. XP practices, including test-driven development, pair programming, and continuous integration, ensure the system is reliable, adaptive, and responsive to evolving user needs. Frequent stakeholder feedback and incremental development cycles enable the system to tackle dynamic challenges, optimize resource utilization, and ensure timely project delivery. By incorporating XP principles, this study demonstrates the potential of agile methodologies to enhance construction project management. The resulting system provides a flexible and efficient solution for mitigating delays and improving the overall success of ship construction projects.

Information system is an important component of any institution, a proper information system could bring a lot of benefits. An example of this is the attendance system. Chinchin Production faced a difficult challenge of managing human resources because previously employees had to sign their attendance manually, which is proven to be inefficient. The solution to this challenge is a proper attendance system to replace the old manual attendance system. The development methodology used is Extreme Programming (XP). Extreme Programming (XP) is an Agile project management methodology that aims for speed and simplicity. The prototype is designed using Unified Modeling Language (UML) as a modelling tool to visualize the structure of the system, as well as Figma to design the User Interface (UI) of the system. This attendance system helps Chinchin Production in managing human resources.

This research presents an expert system using the extreme programming method to determine the level of ability in public speaking. Public Speaking is an important speaking skill in many fields, but it is often difficult for individuals to evaluate their ability. The extreme programming method is used to provide a reliable level of workmanship in the public speaking system. The expert system will provide recommendations in the form of solutions, or strategies that can help individuals improve their public speaking skills. individuals in improving their public speaking skills. The solutions provided will be adjusted to the individual's ability level, so as to provide effective knowledge. The trust method used is the certainty factor method. The results displayed are information about level of public speaking ability, the level of confidence of an expert along with solutions that can be done next by website users.

In this study, a website and UI/UX design ordering service system was developed. This system offers clients to make orders through a website that can make it easier for people to find service experts in the field of website and UI/UX design. The development of this system was carried out using the Extreme Programming (XP) method, this method is a software development that emphasizes flexibility, communication, and adaptability to changing requirements. Researchers will use short iterations to create, build, and test websites and UI/UX designs. To ensure a thorough understanding of client requests and preferences, developers and customers will communicate more frequently. The testing method on the system used in this study is User Acceptance Testing, which is a testing stage where the system or software is evaluated to ensure that the system meets user needs and requirements. Users perform this test to ensure that the system functions properly and meets their expectations. The results of this study, system development using the Extreme Programming (XP) method is very helpful for developers because the needs of each user are clearly defined, the use of the User Acceptance Testing method shows that each function of the application system operates according to user needs. Thus, the use of the Extreme Programming method can improve the system development.

The Bengkalis Regency Education Office (Disdik) provides Local Children's Scholarships to students in an effort to help students to alleviate the dependents of the Single Tuition Fee (UKT) in pursuing education. In determining the recipient of the Tempatan Children's Scholarship, the Education Office government carries out several stages manually such as collecting all the files of students who register, after which the Education Office checks the completeness of the student files one by one, gives a value for each predetermined criterion and manually calculates the value of the criteria. A decision support system for recipients of web-based Local Children's Scholarships is needed to help determine recipients of Local Children's Scholarships to be faster and more accurate. This system is made using the Simple Additive Weighting (SAW) method and Multi Attributive Border Approximation Area Comparison (MABAC) to facilitate the calculation and comparison of the value of each alternative in the system, by determining the ranking based on the largest value as the best alternative. The result of the application of the SAW and MABAC methods in the system is that the system displays alternative data sequentially based on rankings that can help in determining the recipient of the Local Children Scholarship. From 60 field data, the application of SAW and MABAC methods on this system has an accuracy of 83.3%. The development method used is the Extreme Programming method.

Thesis at the Wira Wacana Christian University Sumba Animal Husbandry Study Program involves the stages of submitting a title, registering for a proposal exam, and a thesis exam. This process currently uses Google Forms, with result announcements via WhatsApp, creating inconsistencies and taking a long time. Changing the thesis title requires additional steps, such as students having to come to campus to remove the old title after it is rejected. Challenges also arise in tracking the frequency of tutoring, especially with large student numbers. This research aims to develop an effective solution by applying the Extreme Programming (XP) method in developing web-based applications. Based on the System Usability Scale (SUS) test, this application received a usability score of 80.2%, making it suitable for use. The successful implementation of this web application makes a positive contribution in improving the quality and efficiency of thesis management in the Wira Wacana Christian University Sumba Animal Husbandry Study Program.

In the current era of computers, technology and information systems have become common aspects of daily life. The evolution of information technology, particularly in the use of computers and the internet, is rapid among society. The presence of technology and information systems greatly aids individuals in disseminating and receiving information. Due to its rapid development, technology and information systems are not only a medium for obtaining information but can also be used as tools in the academic world. The attendance of students at SMA Muhammadiyah Waingapu is still done manually or written using paper/books, making it prone to damage and loss. The purpose of this research is to facilitate teachers in retrieving student data so that when teachers need to conduct grade meetings or promotion meetings, it will be easier to collect each student's attendance. This system is built using the extreme programming method with PHP, CSS, Xampp, and MySQL programming languages.

Babycos.id a home-based business in the distribution of baby and children's supplies, was founded in 2018 in South Tangerang with a focus on sales through online platforms such as Shopee, Lazada, and Tiktok Shop. In facing increasingly fierce business competition, employee management becomes a crucial aspect, especially in the transparent and objective determination of bonuses. The determination of bonuses is considered a form of reward that can boost employee motivation. This outlines the rapid development of Babycos.id's e-commerce in 2022. To motivate employees, the owner of Babycos.id aims to provide significant rewards. Despite the increase in revenue, the management of employee bonus data is still conducted manually through WhatsApp groups, resulting in errors and lengthy calculation times. To address these issues, the author has designed a web-based employee bonus information system, applying the Personal Extreme Programming method. The use of a website-based method with PHP programming language and MySQL database is expected to provide an effective and efficient solution for employee bonus management at Babycos.id. The anticipated outcome is a system capable of addressing existing issues and making a positive contribution to enhancing employee motivation and performance.  

The online goods ordering information system is an application that allows customers to order goods practically via the internet. The Extreme Programming (XP) software development method is an approach that can be used to develop information systems with a focus on flexibility and responsiveness to changing user needs. This research aims to implement the Extreme Programming method in developing an online goods ordering information system. The research method used is a literature study to identify the basic concepts of Extreme Programming and analysis of the design of an online goods ordering information system. The research results show that the implementation of the Extreme Programming method in developing an online goods ordering information system can increase flexibility in dealing with changing user needs and improve the quality of the software produced.

Burglary involves forced or unauthorized entry, which leads to damage or loss of property having monetary or emotional value and, more severely, puts lives at risk. The dire need for the safety of lives and properties has attracted so much research on burglary alert system using Internet of Things (IoT) technology. Most of the research focused on alerting the users of burglary attempts using any or a combination of two notification methods: SMS, call, and email. This study emphasizes three-mode notification that combines SMS, call, and email using the application of IoT technology in a burglary alert system, which uses a Passive Infrared (PIR) sensor for burglar detection to ensure that Homeowners or authorized personnel get alerts in events of imminent attempt to break-ins. The study also details the sensor integration with its supporting components, such as the central hub or microcontroller, buzzer, LED, and network interface in the development of the system. The software was developed to facilitate seamless integration with the hardware, ensuring timely and accurate event detection and subsequent alert generation using Arduino IDE programming language, a framework based on the C++ language. The system effected the 3-mode notification to ensure that users get notification in case of an imminent break-in since the failure of the three modes simultaneously is extremely rare. The system’s performance based on its responsiveness on the 3-mode notifications was evaluated, and an average of 83.56% responsiveness was obtained, indicating an acceptable response time.

Serasan Jaya 3 Building Materials Wood Depot is a business engaged in the sale of building material products, especially wood. Until now the Serasan Jaya 3 Building Materials Timber Depot only uses a manual sales and transaction system, which in this case requires a new breakthrough to keep up with technological developments that are developing in the current era because basically almost all ages demand something practical and easier. By looking at some of the existing problems, the researcher tries to design and build an information system for selling goods at the Serasan Jaya 3 Building Materials Wood Depot based on Android, therefore, the author chose this topic for a thesis entitled "Android-Based Sales Information System at Wood Materials Depot Serasan Jaya 3 Building With the Extreme Programming Development Method” which of course provides speed and convenience for the public to make transactions using mobile phones or mobile-based communication devices such as smartphones, tablets, gadgets, and so on. So that it can make it easy for the Serasan Jaya 3 Building Materials Timber Depot to promote products, product prices and make it easier for people to buy products and find out the prices of building material products from mobile devices. Android-Based Sales Information System at the Serasan Jaya 3 Building Materials Wood Depot was built using UML (Unifield Modeling Language) as its design mode and Extreme Programming as a system development method..

With the changing times, technology has become more sophisticated and powerful. Even all circles of society also feel the impact, as time goes by many people have taken advantage of this technology, thus making it easier for users to carry out activities in each of their activities. Especially in this millennial era, which predominantly uses everything digital. For example, new students who study to the next level at a dominant university from outside the region who need a temporary residence or what is commonly called a boarding house. The difficulty encountered at first was the difficulty of getting information and locations that were easily accessible by students to campus. In this way researchers take advantage of existing problems by utilizing technology to create an information system. With this application, it is hoped that it will make it easier for students to find boarding houses that match the student's wishes and assist the owner of the boarding house in promoting his boarding house. By making this boarding house application, it is a form of utilizing existing technology so that it can be used anywhere and anytime. By using this extreme programming method, it is software development that gives users access rights to add or change application processes. So a website was created to build applications for boarding houses in the city of Sukabumi.