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This study aims to systematically review the application of sensitivity analysis in operational decision-making based on linear programming. The research method used is a Systematic Literature Review (SLR), analyzing scientific articles published between 2018 and 2024 from databases such as Scopus, ScienceDirect, SpringerLink, and Google Scholar. The review focuses on how sensitivity analysis is employed to evaluate the stability of linear programming solutions in the face of parameter changes, such as objective function coefficients, constraint bounds, and resource availability. The results indicate that local sensitivity analysis approaches are the most commonly used due to their simplicity and ease of interpretation. However, they fall short in capturing parameter interactions and complex uncertainty. Therefore, recent studies have started to explore global sensitivity methods, such as Morris and Sobol techniques, as well as geometric visualization approaches to provide a more holistic understanding. This study recommends integrating both local and global approaches and utilizing computational tools to enhance the robustness of operational decisions. The findings are expected to serve as a reference for more adaptive, efficient, and resilient decision-making under uncertainty.

This study aims to examine the use of Macaulay2 software in improving students' computational thinking skills in mathematics learning, especially in abstract algebra material. Macaulay2 as an open-source Computer Algebra Sistem (CAS) provides a symbolic and algorithmic environment that encourages logical and systematic exploration of mathematical concepts. Literature reviews show that the use of Macaulay2 can strengthen conceptual understanding, train computational thinking, and introduce mathematical programming to students. However, technical challenges, limited Indonesian language teaching materials, and limited educational infrastructure are obstacles that need to be overcome through collaboration between educational stakeholders.

Linear programming is a crucial operations research method for optimization problems in various fields like manufacturing and logistics, but it is often hindered by the absence of a basic feasible solution due to artificial variables. The Big M method addresses this by adding artificial variables and a large penalty, allowing the discovery of a valid initial solution without altering the constraint structure. This research employs a Systematic Literature Review (SLR) to examine the implementation of the Big M method in Indonesia from 2015-2025, analyzing journals and proceedings related to linear programming optimization. The review findings indicate that this method is highly effective and flexible for diverse cases such as production, animal feed, and scheduling, capable of handling artificial constraints and optimizing profit or cost. Although efficient, the Big M method has drawbacks, including computational complexity and dependence on the precise selection of the M value, which can affect result accuracy. Overall, the Big M Method remains relevant and important for real-world optimization problems requiring systematic constraint handling.

The home industry "Eka Jaya" is a small business engaged in the production of snacks. In an effort to increase efficiency and daily profits, an optimal production planning method is needed. This study aims to maximize daily profits through the application of the simplex method in compiling the right production strategy. The simplex method is used to solve linear programming problems by maximizing the objective function in the form of profit and considering resource constraints such as raw materials, labor, and production time. The results of the study indicate that the application of the simplex method is able to provide an optimal production combination that produces maximum profit compared to the conventional method that has been used so far. Thus, this method can be used as a reference in making production decisions in the home industry "Eka Jaya".    

The PG45 DC motor is a drive system used on sediment detection boat. To achieve the desired stability and speed, it is necessary to apply a control system to the sediment detection boat drive system. Control systems need to be tuned to ensure that they function properly and are responsive to changes. In order to complement the previous research, further research was carried out focusing on determining the PID control parameters on the angular speed of the PG45 DC Motor using Simulink. The PG45 DC motor works based on the Arduino programming algorithm that has been designed so that it can rotate at a predetermined speed. This research modeled the sediment detection ship system on Simulink with a similarity rate of 94.09%. The results of this study indicate that the tuning method used, namely trial and error, produces good control on the sediment detection ship system model that has been assembled in Simulink with the value of Kp = 100; Ki = 5; Kd = 15 obtained the value of rise time = 0.2474 seconds and settling time = 0.4104 seconds and overshoot = 0.2175%%.

Mathematical logic is a branch of science that studies the principles of logical reasoning and how to judge the truth of a statement. This article discusses the role of mathematical logic in everyday life, especially in education, technology, and finance. Mathematical logic has been proven to help improve critical, analytical, and systematic thinking skills, making it easier for individuals to solve various problems more effectively and efficiently. In the world of education, mathematical logic supports the development of rational, argumentative, and problem-solving skills, and is an important foundation in the science and mathematics curriculum. Teachers can leverage this logic to encourage students in building consistent reasoning and logical argumentation. In the field of technology, mathematical logic is the foundation in the development of modern computing systems, such as algorithms, programming, artificial intelligence, and data structures. Without mathematical logic, digital systems such as search engines, software, and applications cannot function optimally. In finance, mathematical logic plays a role in budget strategy, investment decision-making, statistical analysis, and rational risk management. With a good understanding of logic, individuals and institutions can make more wise and measurable financial decisions. Although his contribution is large, there are still many people who do not understand the basic concepts of mathematical logic. This can be overcome through more inclusive education, contextual approaches, and interactive learning based on real problems, both in schools and non-formal environments. This study emphasizes the importance of mathematical logic as a foundation in supporting a more rational, efficient, and structured life in today's modern era. Increasing mathematical logic literacy can be a national strategy to create a society that thinks critically, is competitive, and ready to face global challenges.

Indonesia's rich natural resources offer immense potential for tourism development, with various locations evolving into popular tourist destinations. Kledung Pass, with its stunning views of three mountains, is an attractive stopover for travelers heading to cities across Java. Despite its popularity, however, there is no clear technical framework for designing rest areas in such locations. This study addresses the gap by proposing a new concept that reimagines rest areas as tourist destinations, providing brief yet meaningful stops for travelers. The research conducted surveys with road users to understand their rest needs while traveling. It focused on identifying key factors influencing the need for rest from a neuroscience perspective, considering both the physiological and psychological aspects. These findings were analyzed using William Peña’s space programming theory to develop appropriate design standards. The results indicated two main factors driving the need for temporary stopovers: physical fatigue from long journeys and emotional boredom. These findings underscore the necessity for spaces that cater to both physical relaxation and mental rejuvenation, creating a more holistic rest area experience. The proposed design standards move beyond traditional rest areas, integrating recreational features to enhance user experience. The design that considers the effective zoning layout and the use of environmentally friendly materials is expected to be able to create an economically efficient rest area, while providing a positive experience that is environmentally friendly. Overall, planning non-toll rest areas with neuroarchitectural principles can create functional rest areas that support mental health, as well as strengthen Indonesia's tourism appeal through sustainable and highquality space experiences.

Scratch is a block-based visual programming language that is very suitable for beginners to create animations, games, and interactive stories. This community service program (PKM) aims to introduce interactive story making to students of MTs Pembangunan Nurul Islam. Activities are carried out through training, mentoring, and direct practice with a creative and fun approach. The results of the activities show an increase in student interest and creativity in using Scratch as a medium for digital expression. Interactive stories have also proven effective in fostering digital literacy, logical thinking, and problem-solving skills.

Scratch is a block-based visual programming language that is very suitable for beginners to create animations, games, and interactive stories. This community service program (PKM) aims to introduce interactive story making to students of MTs Pembangunan Nurul Islam. Activities are carried out through training, mentoring, and direct practice with a creative and fun approach. The results of the activities show an increase in student interest and creativity in using Scratch as a medium for digital expression. Interactive stories have also proven effective in fostering digital literacy, logical thinking, and problem-solving skills.

The aim of this study is to design a battery charging system using solar panels, integrated with an IoT-based monitoring system to improve efficiency and ease of supervision. The system utilizes the photovoltaic effect to convert solar energy into electrical energy, which is then stored in a battery through the regulation of a solar charge controller. The main components in this design include a solar panel, lead-acid battery, ESP32 microcontroller, current and voltage sensors, and the Blynk application for remote monitoring. The research method involves several stages, including the design of hardware such as solar panels, current and voltage sensors, and a step-down regulator, as well as software development using the Blynk platform and ESP32 programming. Test results show that the system is capable of achieving charging efficiencies between 89.45% and 99.57%, with optimal performance under clear weather and maximum sunlight conditions. The IoT system performs well up to a distance of 10–15 meters, with an average data transmission delay of less than 1.5 seconds. Therefore, this device proves to be effective as an independent battery charging and energy monitoring solution in locations without permanent electricity access.

Micro, Small, and Medium Enterprises (MSMEs) have a significant role in the economy, including MSMEs in the culinary sector such as Putri Ice Cream Business. Decision making related to optimal resource allocation is crucial to increase the efficiency and profitability of MSMEs. This study aims to apply the linear programming method with the primal simplex algorithm to minimize production costs in the case study of Putri Ice Cream MSME. The objective function is to minimize the total production cost, as well as the limitations related to the availability of main raw materials and machine production capacity. Data on main raw materials and machine production capacity were obtained from the Putri Ice Cream MSME which was the case study. The results of the study show that the application of the primal simplex method produces an optimal solution that provides recommendations for product combinations for each type of Putri Ice Cream with minimal production costs. Sensitivity analysis was also conducted to test the stability of the optimal solution to changes in capital. This study provides a practical contribution to Putri Ice Cream MSME in optimizing their resource allocation and increasing cost efficiency through a quantitative approach.    

This study aims to develop an interactive learning media based on android using a valid and practical smart app creator to improve students' understanding of the SPBI course in the Industrial Automation Engineering Department of SMK Negeri 1 Pariaman. This study uses the Research and Development (R&D) method with the ADDIE model as a guideline in the development process. The results of this study provide evidence that the interactive learning media created falls into the "Valid" category. This is proven based on validation carried out by material experts with a validity value of 87% (0.870) and validation carried out by media experts with a validity value of 92.11% (0.921). Furthermore, a Media Practicality Test was carried out by class XI students of SMK Negeri 1 Pariaman with a practicality value of 91.60% (0.961) falling into the Very Practical category.

This training program is designed to strengthen digital literacy and basic skills in data analysis for high school students in the Saboking-king area, Palembang, by introducing the Python programming language and the use of Google Colab as a cloud-based programming platform. The approach applied is project-based learning and hands-on experience, which includes planning, implementation, and evaluation stages. Based on the implementation results, the majority of participants showed a good understanding of Python basics and successfully completed the mini-project assignments. The final evaluation revealed an increase in students' motivation and interest to explore programming further. The success of this program confirms that the learning methods and media used are able to support students' understanding of the basic concepts of data analysis. Similar activities are recommended to be implemented in other areas that have limited access to technology.

Computational thinking skills are one of the important competencies in the world of education in the 21st century, especially in the fields of science, technology, engineering, and mathematics (STEM). GNU Octave as an open source software similar to MATLAB offers a numeric programming environment that can be used to train and develop students' computational thinking skills. Researchers use a literature study method that aims to see the extent to which GNU Octave can be used in learning to improve students' computational thinking skills. The literature sources used come from national and international journal articles, conference proceedings, and other trusted sources over the past 10 years. The results of the review show that GNU Octave is effective as a learning tool for numeric programming, problem solving, and mathematical modeling, and has a positive contribution to honing students' algorithmic and analytical thinking skills.

Blessing Store is a business engaged in the sale of clothes, shoes and hoodies located in Rawalumbu District, Bekasi City, West Java. Blessing.Store offers various types of clothes, shoes and hoodies. So far, Blessing Store product marketing has been through Instagram social media. Basically, the use of this media has been able to increase marketing and sales. However, there is another problem in the use of this media, namely the form of product promotion through advertising must incur quite a large cost because the advertising display rates are expensive to reach more consumers. Therefore, in this Scientific Writing, a Blessing Store website was created using PHP and MySQL. The stages of creating this website include designing the website appearance, creating a database using MySQL, creating program codes using PHP programming, creating a website appearance using the Bootstrap framework, and testing. Based on the results of testing the Blessing Store website using the Blackbox Testing method, device, browser, all page functions contained in this website have been successful according to their functions, so it can be concluded that the creation of the Blessing Store website has run according to what is expected and there are no obstacles. This website is expected by consumers to get information about products, locations, how to order, payments, and so on in more detail and complete. In addition, this website can facilitate Blessing Store managers in managing transactions, organizing incoming orders, and increasing marketing activities. The Blessing Store website can be accessed via the url address http://blessingstore.my.id/.

This study aims to optimize sales profit at the MSME Batagor Bandung Tarakan by applying the Simplex method in linear programming, supported by the POM-QM for Windows software. Profit optimization plays a crucial role in strategic decision-making, particularly in determining the optimal daily production quantities to enhance operational efficiency, maximize the use of raw materials, and meet market demand effectively. The Simplex method was chosen for its ability to solve linear optimization problems involving multiple constraints and variables, providing accurate mathematical solutions to achieve maximum profit. This research utilizes daily production data as the basis for analysis, which is then processed using the Simplex method in POM-QM. The results show that implementing the Simplex method can increase daily profits from IDR 634,000 to IDR 831,408 through a more efficient production combination. The study concludes that the Simplex method, when applied via the POM-QM software, is an effective tool for daily production decision-making and can support MSMEs like Batagor Bandung Tarakan in improving their competitiveness and business sustainability.

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)

Fish is one of the easiest foods to get, but fish easily spoil. So there are 2 methods to extend the life of fish so that they do not experience a spoilage, namely drying and salting. In the 4.0 era, technology is growing rapidly, one of which is IoT-based technology, in order to help all activities carried out by humans to be more effective and efficient. The purpose of this study is to design an automatic salted fish dryer system using the Internet of Things (IoT) and determine the performance effectiveness of salted fish dryers using the Internet of Things (IoT). The research method of this scientific paper uses an experimental method to test the hypothesis that will be proposed and is useful for predicting an event. Data collection techniques using literature study, data collection, needs analysis, application design and application programming as well as algorithm implementation. Based on the results of the research, the design of an automatic salted fish drying equipment system based on the Internet of Things (IoT) has the ability to monitor the movement of the tool through a smartphone. All components of the appliance can operate automatically just by pressing the start button and setting the duration of the time and the existence of an Internet of Things (IoT)-based salted fish drying device can facilitate and streamline the time when the process of drying fish into salted fish. Initially, small anchovies weighing 100 grams were dried for 3 days, but after using a salted fish dryer, the drying process was reduced to 3 hours (09.00 a.m-13.00 p.m) with a moisture content of 18 grams, while small flying fish weighing 100 grams required a drying process for 5 days (09.00 a.m-13.00 p.m) and would have a moisture content of 30 grams in 3 hours after using a salted fish dryer.

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 study aims to design and implement a web-based outpatient registration information system at Regional General Hospital (RSUD) X to overcome issues arising from the manual registration system. The current manual registration system at RSUD X causes problems such as long queues, potential data entry errors, lost files, and difficulty in finding patient medical history. As a result, patient waiting times are longer, the administrative staff's workload increases, and the overall effectiveness of services decreases. The research method used is a qualitative one, which describes various processes in the system, from patient data input to the digital registration receipt output. The system design approach uses the waterfall method. Data collection was carried out through purposive sampling, while data gathering was done through interviews with registration officers, direct observation, and a documentation study in the medical records unit. The system is built with a combination of technologies, including PHP as a server-side programming language and MySQL as the database. The result is a web-based outpatient registration information system that can improve the efficiency and quality of hospital services. The advantages of this system include wide accessibility, time efficiency, and effective data management. This system is expected to reduce patient queues, improve the efficiency of the registration process, and simplify patient data management. However, the implementation of this system may face challenges such as limited resources and user skills. Solutions to overcome these challenges are effective resource allocation and user training. Overall, the web-based outpatient registration information system can be an effective solution to improve service quality at RSUD X.