Time is money and a reduction in time should be the first goal of any training program or any employee development initiative. The skills and knowledge acquired today become irrelevant or obsolete quickly. In that kind of dynamics, the organizations have shifted focus on how to shorten time to proficiency of employees and bring them up to speed to the required performance in a shorter time. This book intends to establish scholarly know-how on this construct of Accelerated Proficiency and provide practitioners and researchers with a condensed and coherent knowledge-base on this burning business concept. The book explores concepts, themes, nature, and challenges associated with the process of accelerating proficiency. This book discusses the business metrics of time to proficiency and speed to proficiency. This book is organized around reviews of studies on performance and proficiency from several different disciplines spanning over five decades. In particular, this book will enable you with the answers to some crucial questions - What is the nature of the proficiency in the organization? What is the meaning and goal of accelerating proficiency? Whether or not proficiency and performance of employees can be accelerated? What kind of methods has been researched and proven to accelerate proficiency?