The study delves into the intricate relationship between employee training and performance outcomes within the telecommunications sector, particularly focusing on Bangladesh. It underscores the crucial role of employee training in driving innovation, maintaining competitiveness, and enhancing organizational performance in an ever-evolving industry landscape. The study defines training effectiveness as the extent to which training programs contribute to improving employee performance across various dimensions such as technical skills, customer service, sales, compliance, and innovation. Using a mixed-methods approach, including survey data and qualitative insights from industry professionals, the study aims to uncover the mechanisms through which training impacts employee performance. It emphasizes the need for robust analysis methods beyond traditional statistical tests like the F-test to capture the complexity of these relationships. Firstly, it provides an overview of the research background, significance, and methodology, setting the stage for subsequent chapters. It identifies the research problem, formulates research questions, and outlines the study's structure, emphasizing the importance of a comprehensive literature review to inform theoretical perspectives and hypothesis formulation. Moreover, the study explores the theoretical basis underlying employee training and performance, defining core concepts such as training effectiveness, performance, satisfaction, and contribution. It discusses theories like Training Value Management Theory, Innovation Theories of Training, and Core Competitiveness Theories of Training, which inform the understanding of how training influences organizational outcomes. Then, it delves into the mechanisms and hypotheses formulation for empirical testing. The research methodology, including sample selection, data collection, and model construction, is discussed, ensuring methodological rigor and ethical considerations. It also presents the data analysis and findings, incorporating both quantitative regression analysis and qualitative insights from interviews. It discusses the effectiveness of training initiatives, challenges faced, and implications for practice, along with limitations and future research directions. Lastly, it offers a comprehensive discussion of the findings, highlighting theoretical and practical implications for organizations in the telecommunications sector. It emphasizes the role of management in optimizing training programs and fostering a culture of continuous learning. Overall, the study sheds light on the critical role of training in shaping employee performance and organizational success in the telecommunications industry of Bangladesh. It offers valuable insights for practitioners, policymakers, and scholars, contributing to the understanding of training effectiveness and its implications in a rapidly evolving digital age.