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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.

This study aims to describe the Analysis of the Implementation of Policy and Integrated Transportation of Bus Rapid Transit (BRT) in Medan City. The qualitative research method is also known as a method where the research is conducted under natural conditions. This research method is a scientific procedure or approach to obtain data with specific objectives. Data analysis is the process of systematically searching for and organizing data. The data collection techniques used in this study are observation, interviews, and documentation studies. The data obtained are then analysed through three stages: data reduction, data presentation, and verification. The results of the study show that the Medan City Government is currently implementing significant development in urban mobility with two main activities: the development of Bus Rapid Transit (BRT) and the development of Kesawan and Merdeka Square areas. Both activities emphasize the importance of developing pedestrian and cyclist facilities while facilitating the people of Medan City in accessing public transportation. These efforts are positive actions taken by the Medan City Government toward the development of sustainable urban mobility while ensuring that all corners of Medan City can be reached by quality public transportation.

Writing articles in this journal aims to describe the service quality of the Trans Semarang Bus Rapid Transit and its sub parameters which include descriptions tangibles, reliability, responsiveness, assurance, dan empaty. The writing method uses a qualitative descriptive approach. The data source is the primary source of Trans Semarang Bus Rapid Transit passengers and the secondary data source is documents at the Trans Semarang Bus Rapid Transit company. Collecting data by observation and interviews with a questionnaire as an instrument. The discussion on the level of service quality of the Trans Semarang Bus Rapid Transit uses an analysis of the average percentage value through the sum of the scores achieved divided by the expected score multiplied by 100 %. Determining whether the quality of Trans Semarang Bus Rapid Transit service is good or not by determining very good 0.00-24.99%, good 25-49.99%, not good 50-74.99% and bad 75-100%. The findings of the discussion of the results of the analysis are that the level of service quality for the Trans Semarang Bus Rapid Transit is very good and also for several sub-parameters tangibles, reliability, responsiveness, assurance, and empaty are all very good level. However, there are several dimensions of the five service quality parameters in the unfavorable category. The conclusion from the findings of the discussion of the analysis of the service quality of the Trans Semarang Bus Rapid Transit is very good in its management so that it can realize the satisfaction of the people of Semarang City and its surroundings.