The book's foundations informing its content are anchored to evidence-based primary data, which was collected in the Thailand context utilising interview and case study techniques. The data has been internationally scrutinized by our peers to validate its truthfulness and integrity. In this way, our book sheds reliable and valid new understandings on the complex relationship between performance management and the effects of culture. The book transcends beyond conceptual discussions as it is anchored to evidence-based data to inform the direct or obvious cultural value differences exploring the very concept of efficacy and how culture impacts on the way in which we perceive what constitutes the pursuit of efficacious outcomes in managing employees. Therefore, this novel research design offers integrated insights from practitioners, and academics, in the field of management within organisations from various Thai industry contexts.