This introduction presents an overview of the key concepts discussed in the subsequent chapters of this book. The book presents a discussion of performance management (PM) practices and policies in multinational enterprise (MNE). It discusses how the increasing globalization has resulted in a proliferation of the MNE, and the unique issues associated with managing employees in MNEs. The book deals with the dynamics of motivation, and the impact of motivation levels on performance, and thus performance management. It explores the impact of rater-ratee relationships on individual performance ratings, and the PM process as a whole. The book also provides a model to examine and highlights the appraisal process in different contexts. It examines a comprehensive discussion of PM system in the United Kingdom. The book discusses the socioeconomic, political, and legal issues that have impacted human resource management in the UK.