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Bus Rapid Transit (BRT) systems play a crucial role in providing efficient and sustainable urban mobility, yet service quality often faces challenges that lead to passenger dissatisfaction. This study focuses on BRT Trans Jateng Corridor 7, which has received a considerable number of complaints regarding service reliability, comfort, and punctuality. The main objective of this research is to improve passenger satisfaction by applying the Six Sigma methodology to identify, analyze, and reduce the root causes of service-related complaints. Using the DMAIC (Define, Measure, Analyze, Improve, Control) framework, data were collected through complaint reports, passenger surveys, and operational performance indicators. Statistical analysis and cause-effect diagrams were employed to pinpoint critical factors influencing complaints, including bus frequency, driver performance, ticketing efficiency, and infrastructure support. The findings indicate that the application of Six Sigma significantly reduced recurring complaints, particularly in the areas of schedule adherence and service responsiveness, leading to measurable improvements in overall passenger satisfaction. The synthesis of results demonstrates that structured quality management approaches such as Six Sigma can effectively enhance public transportation service quality by providing systematic solutions to operational problems. In conclusion, this research highlights the practical benefits of Six Sigma in improving service performance and reducing passenger complaints, offering valuable insights for policymakers and transportation operators seeking to strengthen the quality and sustainability of public transit systems.

Background: Maritime engineering has traditionally relied on reactive and preventive maintenance strategies, often leading to operational inefficiencies, unplanned downtime, and excessive costs. With the rise of smart ship technologies, predictive maintenance (PdM) has emerged as a data-driven solution, leveraging sensor-based monitoring and real-time diagnostics to optimize ship maintenance. However, its integration into maritime education remains underexplored, particularly in training vessels used for vocational learning. Original Value: This research contributes new insights into the feasibility, effectiveness, and educational relevance of predictive maintenance in maritime vocational training. Unlike previous studies that focus on commercial ship applications, this study examines PdM within the context of training vessels at Poltekpel SULUT, bridging the gap between academic training and industry expectations. Objectives: The study seeks to answer: How does predictive maintenance improve the efficiency, cost-effectiveness, and reliability of naval auxiliary systems in training vessels? Methodology: A qualitative approach was employed, integrating sensor-based performance analysis, structured interviews, and questionnaire surveys involving cadets, instructors, and industry professionals. Data were analyzed through thematic categorization, cross-group comparisons, and narrative synthesis. Results: PdM demonstrated high effectiveness in reducing downtime (92/100), optimizing maintenance efficiency (91/100), and aligning with industry practices (89/100). However, challenges in sensor accuracy (85/100) and training integration were identified. Conclusions: The findings highlight the necessity of incorporating predictive maintenance into maritime training curricula to equip future engineers with the skills required for Industry 4.0 maintenance solutions, ensuring better operational efficiency and sustainability in the maritime sector.

This study investigates the impact of Employee Engagement and Work-Life Balance on Job Satisfaction among employees at the Depok City Land Office. The research employed purposive sampling to select participants, and data were collected directly through questionnaires distributed to the respondents. All research instruments underwent rigorous validity and reliability testing, confirming that the items were appropriate for further statistical analysis. Using multiple linear regression analysis, the study found that both Employee Engagement and Work-Life Balance significantly and positively influence Job Satisfaction, both individually and collectively. The results suggest that employees who are highly engaged in their work and who successfully manage a balance between professional responsibilities and personal life tend to experience higher levels of job satisfaction. The coefficient of determination (R²) of 0.567 indicates that 56.7% of the variability in Job Satisfaction can be explained by these two independent variables, while the remaining variation is attributable to other factors not covered in this study. These findings provide empirical support for the importance of fostering Employee Engagement and creating a supportive work environment that promotes Work-Life Balance as effective strategies for enhancing overall employee satisfaction. Practically, this research offers valuable insights for organizational management, particularly in designing reward systems, implementing career development programs, and establishing policies that help employees balance their work and personal lives. By focusing on these strategies, organizations can sustainably improve employee productivity, commitment, and loyalty.

The intense competition in the footwear industry requires companies to adopt effective marketing strategies to influence consumer purchasing decisions. This study aims to analyze the effect of brand image, product design, and price on consumer purchasing decisions for Bata products in Bima City. A quantitative approach was applied, with a sample of 96 respondents selected using accidental sampling. Data were collected through questionnaires and analyzed using validity tests, reliability tests, multiple regression analysis, t-tests, and F-tests with the SPSS program. The results show that brand image has no significant effect on purchasing decisions, while product design and price have a significant positive effect. Simultaneously, brand image, product design, and price significantly influence purchasing decisions for Bata products in Bima City. These findings highlight the importance of product design and price competitiveness in strengthening consumer purchase intentions.

This study aims to determine the significant influence of mathematical resilience on students' mathematical problem-solving ability, as well as measure the magnitude of this influence. The approach used is quantitative with an ex post facto (comparative causal) design, where variables have occurred before the study was conducted. The research population included all grade XII students at MAS Miftahussalam Medan, with a sample of 33 students selected through simple random sampling techniques. The research instrument consisted of a questionnaire to measure mathematical resilience and a test to measure mathematical problem-solving ability. The validity and reliability of the instruments were tested through preliminary trials. Data analysis was carried out through a prerequisite test (normality and linearity), followed by a simple linear regression test, t-test, and determination coefficient. The results of the analysis showed a regression equation Y = 16.803 + 0.273X, with a value of t_hitung = 3.784 > t_tabel = 2.039 at a significance level of 5%, so that H₀ was rejected and H₁ was accepted. The determination coefficient of 0.316 showed that mathematical resilience contributed 31.6% to students' mathematical problem-solving ability, while 68.4% was influenced by other factors. These findings confirm the importance of strengthening mathematical resilience in an effort to improve students' problem-solving skills more effectively.

The increasing integration and digitization of smart grid systems have exposed them to a variety of security threats, necessitating robust security measures to ensure their reliability and efficiency. This paper proposes a novel Digital Twin-Based Cyber-Physical Security Framework, incorporating AI-driven predictive maintenance and zero-trust architecture to address the evolving challenges of securing smart grids. By leveraging digital twin technology, this framework creates a real-time virtual representation of physical systems, enabling continuous monitoring and simulation for enhanced security and operational performance. Zero-trust security principles are integrated to ensure that no entity, whether inside or outside the network, is trusted by default, thus significantly reducing the risk of cyber-attacks. Additionally, AI-driven predictive maintenance enhances the framework’s reliability by proactively identifying potential failures before they occur, reducing downtime and improving system resilience. Through the development and simulation of this framework, including attack and failure scenarios, the paper demonstrates that the proposed system outperforms traditional methods in terms of anomaly detection, system downtime, and response times. The integration of predictive maintenance allows for early identification of component failures, thus enhancing the overall resilience of the grid. The zero-trust architecture further strengthens the cybersecurity posture, preventing unauthorized access and attacks. The study also identifies challenges, such as data synchronization and scalability, which must be addressed for broader implementation in large-scale smart grid systems. The findings suggest that the proposed framework could play a critical role in the future evolution of smart grid security, offering valuable insights for researchers and practitioners.  

This study was conducted to evaluate and confirm hypotheses related to communication, work discipline, and work environment as determinants of employee performance at Pabrik Rokok Cengkir Gading Nganjuk. A quantitative approach with an associative method was adopted. The research utilized a non-probability sampling strategy, specifically the saturated sample method, by involving all 53 employees in the production section. Data were processed using SPSS version 26 and analyzed through validity, reliability, normality, linearity, multicollinearity, heteroscedasticity, multiple linear regression, t-tests, F-tests, and the coefficient of determination (R²). Findings indicate that communication has a positive but insignificant effect on performance (Sig. 0.131 > 0.05). In contrast, work discipline significantly and positively influences performance (Sig. 0.016 < 0.05), while the work environment has a positive but insignificant effect (Sig. 0.052 > 0.05). On the other hand, communication, work discipline, and work environment together significantly affect employee performance (Sig. 0.000 < 0.05). The overall contribution of these three independent variables is 47.9%, with the remaining 52.1% explained by other unobserved variables.

This study aims to analyze the influence of taste, customer experience, and digital marketing on repurchase intention at Mie Ayam Panggang Demi Apa in Kediri. In the increasingly competitive culinary industry, business owners are required to maintain taste consistency, create memorable customer experiences, and optimally utilize digital platforms in their marketing strategies. These three factors are believed to play an essential role in shaping consumer behavior, particularly in encouraging repeat purchases. The research applied a quantitative survey method involving 90 respondents selected using Slovin’s formula. Respondents were customers who had made at least two purchases within the last month. Data analysis was conducted using SPSS version 26 with several statistical tests, including validity and reliability tests, classical assumption tests, multiple linear regression, t-test, F-test, and coefficient of determination (R²). The findings indicate that taste, customer experience, and digital marketing each have a positive and significant influence on repurchase intention, both partially and simultaneously. The R² value of 0.447 shows that 44.7% of the variation in repurchase intention is explained by these three variables. Therefore, it is recommended that business owners consistently maintain product quality, enhance customer experience, and optimize digital marketing to build customer loyalty and ensure long-term business sustainability.

The study used a pseudo-experimental design with a posttest-only control group design pattern. The population included the entire class VII, and the sample was randomly selected of two equivalent parallel classes, totaling 22 students each. The experimental class received the discovery learning treatment, while the control class used conventional methods. The research instrument is in the form of learning outcome tests in the form of objectives and essays that have been tested for validity and reliability. Data were analyzed through normality test, homogeneity test, and t-test of two independent samples at a significance level of 0.05. The results showed significant differences between the two groups. The average posttest score of the experimental class was 80.68 higher than the control class of 72.72. The analysis of the t-test yielded a t_hitung value of 2.74 greater than t_tabel 2.01, which means that the null hypothesis was rejected. The frequency distribution in the experimental class also showed a concentration of scores in the high category, while the control class was more dominant in the medium category. These findings confirm that discovery learning not only improves cognitive learning outcomes, but also encourages students' active engagement, motivation, and critical thinking skills. This study concludes that the implementation of discovery learning is effective in improving science learning outcomes in the classification of living things. Implicitly, teachers are advised to integrate this approach as an alternative to student-centered science learning strategies.

This study aims to explore guest experience as a benchmark for service quality in four-star hotels in Bali. Using a qualitative phenomenological approach, the research was conducted at two representative hotels, namely Four Points by Sheraton Bali, Kuta and The Anvaya Beach Resort Bali. Data were collected through semi-structured in-depth interviews with 20 guests who had stayed for at least one night within the past six months, online review analysis from platforms such as Booking.com and TripAdvisor, as well as participatory observations in service areas.The findings reveal that the dimensions of service quality most influencing guest experience include staff responsiveness, facility comfort, and the authenticity of services that integrate local culture. Guests appreciated staff friendliness and professionalism, room cleanliness, and personal touches such as being greeted by name or receiving special attention, which created positive emotional experiences. However, several weaknesses were also identified, such as delays in room service during peak hours and inconsistent maintenance of facilities. These results are consistent with the SERVQUAL model (Parasuraman et al., 1988), which emphasizes five key dimensions, but this study highlights the emotional experience dimension, which has been less explored in hospitality research in Bali. This study makes a theoretical contribution by broadening the understanding of the relationship between service quality and guest experience, particularly in the context of four-star hotels that are characterized by high service standards and intense competition. The practical implications suggest that hotel management should strengthen service personalization, ensure consistency in staff reliability and responsiveness, and enhance the integration of local cultural values as a differentiation strategy to increase competitiveness. Thus, guest experience can serve as a primary indicator that not only reflects service quality but also builds customer loyalty and strengthens the hotel’s positive image among both domestic and international tourists.

This study investigates the influence of the marketing mix on consumer purchasing decisions at Rahayu Souvenir Shop. A quantitative research approach was applied to examine the relationship between the marketing mix elements and consumer behavior. Data collection involved the use of structured questionnaires distributed to consumers. The sample consisted of 95 respondents, selected using the Slovin formula based on the total population of the shop’s customers. Several statistical tests were conducted to ensure data validity and reliability, including validity and reliability tests, as well as classical assumption tests such as normality, heteroscedasticity, and multicollinearity tests. These tests were prerequisites for conducting multiple linear regression analysis. The results of the analysis revealed that the product variable (X1) does not have a significant influence on consumer purchasing decisions, as indicated by a significance value of 0.625 (> 0.05). On the other hand, the price variable (X2) showed a significant influence with a significance value of 0.020 (< 0.05), while promotion (X3) and location (X4) also had significant effects with significance values of 0.009 and 0.000, respectively. Furthermore, the F-test results indicated that the product, price, promotion, and location variables together have a significant effect on purchasing decisions, as shown by a significance value of 0.001 (< 0.05).

This study aims to examine the influence of Brand trust (X1), Taste (X2), and Product Innovation (X3) on Consumer Purchase Intention (Y) at CFC Stasiun Kediri. The research adopts a quantitative approach with data collected through questionnaires and processed using SPSS 25. The sample was determined using purposive sampling and the Hair et al. formula, resulting in a total of 105 respondents. The analytical techniques employed include Validity Test, Reliability Test, Classical Assumption Test, Multiple Linear Regression Analysis, t-test, F-test, and Coefficient of Determination (R²). The results show that Brand trust has a significant effect on consumer purchase intention at CFC Stasiun Kediri with a significance value of 0.000 < 0.05. Taste has a significant effect on consumer purchase intention with a significance value of 0.008 < 0.05. Product Innovation also has a significant effect on consumer purchase intention with a significance value of 0.000 < 0.05. Furthermore, Brand trust, Taste, and Product Innovation simultaneously have a significant effect on consumer purchase intention at CFC Stasiun Kediri.

This study aims to explain the procedure for processing the Notice of Readiness (NOR) document for coal-carrying vessels at PT. Armada Lintas Baruna Bandar Lampung and to identify the consequences that occur when the NOR is submitted late or contains inaccuracies. As vessels from international shipping companies frequently call at Indonesian ports to transport coal abroad, companies must continuously improve service efficiency and reliability to support national shipping and trade performance. PT. Armada Lintas Baruna plays a key role in managing export vessels, particularly coal carriers, from loading ports to their country destinations, and the NOR serves as a crucial document through which the Ship Master declares that the vessel is fully prepared to load or discharge cargo during the charter period. The NOR service process includes several stages: verification of vessel readiness by the agent, preparation and submission of the NOR document, verification by the port authority, issuance of NOR confirmation, and document closing. Delays or errors in NOR submission can disrupt the vessel’s operational schedule, potentially causing financial losses for shipowners through demurrage charges. This paper employs both field research and library research to provide an in-depth understanding of the NOR service mechanism.

This study aims to assess the quality and impact of supporting tourism facilities at Sisingamangaraja XII International Airport in strengthening the development of Lake Toba as a Super Priority Destination. The airport holds a strategic role as the main gateway for tourists visiting the Lake Toba area, making the quality of services and the completeness of facilities crucial aspects in creating a memorable travel experience. The research employed a qualitative approach with data collected through in-depth interviews with key informants, direct field observations, and documentation. Data analysis was conducted using the (SERVQUAL) model, which evaluates five key dimensions: tangibles, reliability, responsiveness, assurance, and empathy. The findings reveal that the airport has provided several tourism-supporting facilities, including ground transportation services, food and beverage outlets, as well as souvenir and gift shops. However, the implementation of these facilities has not yet reached optimal performance. Identified challenges include the limited choice of transportation options to and from various tourist destinations, the lack of authentic Lake Toba culinary offerings at food and beverage outlets, and the insufficient promotion of local products at souvenir shops. Furthermore, the absence of essential services such as travel agencies and money changers has negatively affected convenience, particularly for international tourists who require accessible information, transactions, and travel services. These findings indicate that improving supporting facilities at Sisingamangaraja XII International Airport is an urgent necessitySuch efforts are expected to enhance the quality of airport services, increase tourist satisfaction, and ultimately reinforce Lake Toba’s position as a leading national and international tourism destination.

This study aims to thoroughly examine the influence of menu variety, taste, and price on customers' purchasing decisions at CEZ-ROS Restaurant, located in Kediri Regency. Understanding these factors is crucial for the restaurant to enhance customer satisfaction and improve sales performance. The research employs a quantitative approach with an associative research type, designed to explore relationships between variables. The sampling technique used is accidental sampling, where respondents were selected based on convenience and their availability during the data collection period. This method allows for practical and efficient data gathering from actual restaurant customers. Data analysis involves several statistical tests to ensure accuracy and reliability. Initially, validity and reliability tests were conducted to confirm the suitability of the questionnaire. Then, multiple linear regression analysis was used to determine how menu variety, taste, and price individually and collectively influence purchasing decisions. Additionally, t-tests assessed the significance of each independent variable, while the F-test evaluated their simultaneous effect. The coefficient of determination (R²) provided insight into how much variation in purchasing decisions could be explained by these variables. The results indicate that menu variety, taste, and price significantly impact purchasing decisions both individually and together. Specifically, customers prefer restaurants offering a diverse menu, delicious food, and reasonable pricing. The F-test confirms the strong combined effect of these factors on consumer behavior. However, the coefficient of determination also suggests that while these variables are important, other external influences such as service quality, ambiance, and promotions may also affect purchasing decisions. Overall, this study highlights that CEZ-ROS Restaurant should focus on maintaining menu diversity, enhancing taste quality, and setting competitive prices to attract and retain customers effectively.

Bina Kesan Cooperative in Bojonggede is a cooperative whose main activities focus on assisting members in meeting financial needs, improving welfare, and encouraging the development of members’ businesses. This study aims to determine the extent to which compensation and motivation influence employee performance. The research method employed was quantitative with a descriptive approach, while the sampling technique was determined using the Slovin formula to ensure that the number of respondents was representative. Data were collected through questionnaires that had been tested for validity and reliability, and then processed using SPSS version 27. The statistical test results indicate that the t-value of 1.492 is greater than the t-table value of 0.2681, with a significance level of 0.00 < 0.05, leading to the rejection of the null hypothesis (H₀). All R-values of 0.05 > R-table 3.18 demonstrate that the research instruments were valid. Furthermore, the F-value of 180.803 is higher than the F-table value of 2.00758, with a significance level of 0.00 < 0.05, confirming that the regression model is significant. Based on these findings, it can be concluded that compensation and motivation variables simultaneously have a positive and significant effect on employee performance at Bina Kesan Cooperative, Bojonggede.

The 5-star hotel is full of beauty, futuristic design, and perfect service. One of the components that guests complain about at the Tentrem Hotel Yogyakarta is housekeeping negligence. The research method is qualitative, with data collection techniques including interviews, observations, and documentation. The results of the study show that the forms of negligence that occur in housekeeping services at Hotel Tentrem Yogyakarta are 3 (three) actions: first, negligence in cleaning guest rooms, errors in placing guests' personal belongings, and delays in providing additional requests (amenity delay). Housekeeping negligence affects guest satisfaction at Hotel Tentrem Yogyakarta by reducing the reliability and tangibles dimensions of service quality. Guests feel the hotel cannot be trusted to provide a comfortable stay experience, leading to a decrease in the empathy and assurance dimensions. Guests feel their privacy is violated, which may even lead to suspicion toward hotel staff. Efforts to improve the negligence occurring in housekeeping services at Hotel Tentrem Yogyakarta involve three actions: implementing an inspection checklist and supervisor verification before guests check-in, ensuring staff are well-trained, educated, and professional in their work, and adopting a digital logistics system to record guest requests and prioritize deliveries.

This study aims to analyze the influence of work stress, work discipline, and work environment on employee productivity at UD. Podo Seneng. A quantitative approach was employed using survey methods through questionnaires, interviews, and observations. The sampling technique applied was saturated sampling, involving the entire population of 40 employees. Data analysis included validity and reliability tests, classical assumption tests, and multiple linear regression analysis supported by t-tests, F-tests, and the coefficient of determination (R²). The results show that, partially, work stress has a negative but insignificant effect on productivity. In contrast, work discipline and work environment have a positive and significant effect on productivity. Simultaneously, the three variables significantly influence employee productivity, contributing 49.7% to the variance. These findings indicate that strengthening work discipline and creating a conducive work environment are dominant factors in improving productivity, while the effect of work stress remains inconsistent and requires further investigation in different organizational contexts.

This study aims to analyze the effect of member card usage on customer satisfaction at Bolly Department Store in Bima City. The research applied a quantitative approach with a survey method, where data were collected through questionnaires from 96 respondents selected using purposive sampling, specifically customers who owned a member card. The research instrument was tested using validity and reliability tests to ensure accuracy and consistency. Data were analyzed using simple linear regression, correlation coefficient, coefficient of determination, and t-test with the assistance of SPSS software. The findings indicate that the member card variable has a positive and significant effect on customer satisfaction. This is evidenced by the t-test result, where the t-value (1.894) exceeded the t-table value (1.661). However, the coefficient of determination (R²) was only 0.029, meaning that the member card explains merely 2.9% of the variation in customer satisfaction, while 97.1% is influenced by other factors. Therefore, although the member card improves customer satisfaction, its contribution is relatively small, suggesting that additional and more comprehensive marketing strategies are needed.

This study was conducted to examine the extent to which information quality and consumer trust influence the interest in purchasing fashion products online through the Facebook platform. The study population included all active Facebook users in Indonesia who had purchased fashion products, either through the Marketplace feature or buy and sell groups. The research sample was selected using purposive sampling, and 100 respondents were successfully collected. Primary data was obtained through an online questionnaire distributed using Google Forms. The research instrument used a five-point Likert scale, where respondents were asked to provide their level of agreement with statements related to information quality, trust, and purchasing interest. Data analysis used the Partial Least Square – Structural Equation Modeling (PLS-SEM) approach, which was run using SmartPLS version 4.0 software. This method was chosen because it is capable of testing the relationship between latent variables comprehensively, even though the research sample size was not very large. The results of the analysis showed that information quality did not have a significant effect on consumer interest in purchasing fashion products through Facebook. Conversely, consumer trust was found to have a positive and significant effect on purchase interest. These findings confirm that in the context of online transactions on social media, trust in the seller and the reliability of the platform are more decisive factors than the quality of information.