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E-commerce competition in Indonesia makes e-commerce companies compete to develop strategies to win the competition. Customer loyalty is an important factor to lead in the competition. This research focuses on how much influence website service quality has on customer loyalty. This research is also to find out which website quality factors have the most influence on customer loyalty with customer satisfaction as a mediating factor. The factors that influence e-commerce customer loyalty are analyzed using concepts including the dimensions of service quality consisting of (physical evidence, reliability, responsiveness, assurance, empathy) and Corporate Image as the variable that influences and Customer Satisfaction as the variable that is affected. The sample in this study were 96 respondents. With the sampling method using the purposive sampling method. The results obtained that there is a positive and significant influence between the dimensions of service quality and company image on customer satisfaction.  Keywords: E-commerce website, Service Interaction Quality, Customer Satisfaction

Product distribution is a crucial element of the supply chain system that ensures the smooth flow of goods from producers to consumers at minimal cost and with high reliability. Distribution efficiency not only reduces operational costs but also improves customer satisfaction, market competitiveness, and business sustainability. In the context of Micro, Small, and Medium Enterprises (MSMEs), distribution efficiency becomes even more critical due to limited financial, human, and infrastructural resources. This study aims to analyze the product distribution efficiency of UMKM Kerupuk Jaya Pesona, located in Cinanggung Village, Serang Regency, Banten Province, by applying two classical transportation methods: the North West Corner (NWC) and Least Cost (LC) methods. Both methods were used to determine the allocation pattern that minimizes total transportation cost across three destination regions: Serang, Cilegon, and Pandeglang. The data include three couriers (as supply sources) and three market destinations (as demands), totaling 18,000 product units per distribution cycle. The results show that both NWC and LC methods yield the same total transportation cost of Rp 358,000,000, although their allocation patterns differ. This indicates that the supply–demand and cost structure of the UMKM’s logistics system is balanced. This research concludes that simple optimization methods such as NWC and LC can serve as practical decision-support tools for MSMEs without requiring complex computational models. The study also recommends the application of the Modified Distribution (MODI) method to verify the optimality of the solution and highlights the importance of logistics efficiency in strengthening MSME competitiveness in the digital era.

Digital Business is experiencing rapid growth, including in the online-based food business. The Internet is creating a new face in interactive communication between sellers, consumers and business partners. This allows the company to be able to interact and work together continuously to be able to develop products, marketing, delivery and maximum service to get customer satisfaction. One type of business that is currently growing rapidly and is very popular with customers is food delivery services including go food, grab food and shopee food. This delivery service will increasingly compete according to the response from customers, influenced by the quality of service. The purpose of this study was to find out how service quality affects customer satisfaction, especially in online- based food delivery applications. The research used in this research is quantitative analysis method. The method used is to collect information obtained from questionnaires. Variable indicators were tested for validity and reliability. In testing this validity using the Pearson Correlation approach. The reliability test in this study used Cronbach, Alpha coefficient. The results of the study explain that the service variable partially has a positive effect on customer satisfaction. The influence of service quality provided by service providers and service partners is very well responded by application users.

This study aims to develop a valid and reliable instrument and can be used to measure the behavior of high school students regarding water pollution. The steps undertaken to develop this instrument are the development of a collection of question items, validation of a collection of question items, taking opinion experts, trials, instrument administration, documentation, calculating the validity and reliability of instruments using trials of this instrument which contains the habits of water pollution. The validation stage was submitted to one high school biology teacher and two biology lecturers. The instrument test was conducted with a group of 20 high school students with 15 questions. The results showed that the Corrected Item-Total Correlation of 15 questions created and validated there were 6 questions that were positive while 9 other questions were negative. Then for the value of Reliability Statistics for Cronbach's Alpha is 0.469 and Cronbach's Alpha Based on Standardized Items is 0.417. The conclusions from the results of the study as a whole assessment instruments are good and can be used.Keywords: Behavior, Water Pollution, Instrument Development.

This study aims to develop valid research instruments and can be used to measure the knowledge of high school students as equals about water resources. The stages in the development of instruments carried out are the development of a collection of question items, validation of a collection of question items to school namely to biology teachers and to biology lecturers, taking expert opinions, testing validated instruments, administering instruments, and calculating instrument validity and reliability. This instrument contains statements to measure knowledge about water resources. The instrument validation phase was handed over to one biology teacher, and two biology education lecturers. The trial of this instrument was conducted on 26 high school students equivalent. The results of this trial show that out of the fifteen item items only six items are suitable that can be used to measure high school students' knowledge of water resources. The six question items consist of true and incorrect item items. Cronbach's alpha coefficient is -0.65. According to these findings, it can be concluded that the instrument is invalid and cannot be used to measure students' knowledge of water resources.Keywords: Instrument Development, Knowledge, Water Resources.

The quality of health services shows the level of perfection of health services in creating a sense of satisfaction in patients.In this study, researchers used a purposive sampling type of research, namely sampling with special criteria, namely inclusion and exclusion criteria with a cross sectional approach, namely research that explores, analyzes and explains the relationship between the quality of health services and patient satisfaction at the Ridge Health Center. The data needed comes from filling out questionnaires by patients or families of patients seeking treatment at the Ridge Health Center.The sample in this study used 44 respondents who received treatment at the Ridge Health Center. And in this research, the instrument used was a questionnaire with a total of 40 questions.The results of this study show that there is a relationship between the quality of health services, reliability (0.038<0.05), assurance (0.000<0.05), tangibility (0.002<0.05), empathy (0.000<0.05), and responsiveness (0.000 <0.05) with patient satisfaction. The conclusion of this research is that there is a relationship between the quality of health services (reliability, assurance, tangibility, empathy and responsiveness) with patient satisfaction at the Ridge Community Health Center. The advice that researchers can give is that they can evaluate and improve management to improve the quality of service so that patient satisfaction is related to research results, namely the components of speed of administration, patient comfort as well as completeness of medical equipment and accuracy of information so that it is hoped that it can increase patient satisfaction.