The pharmaceutical industries are hungry to speed up formulation development process. In Vitro-In Vivo Correlation (IVIVC) modeling fulfills this objective efficiently. The objective of this book is to provide a systematic approach to develop level A correlation for the poorly soluble drugs leading to development of a suitable dosage forms of biopharmaceutical classification System (BCS) Class II drugs by reducing time and cost i.e. research and development (R & D) work. This book is also helpful for the postgraduate students of pharmacy and allied sciences to get basic guidelines for pre-clinical and clinical studies of developed formulations.