Quality control is defined as a set of activities or techniques whose purpose is to ensure that all quality requirements are being met. In scientific areas quality control for an analytical laboratory is essential to ensure good comparability of data in applications like insulin administration decision and transfusion-associated graft-versus-host disease. In engineering, statistical process control is one of the most important tools employed to monitor a production process over time in applications like wind farms maintenance and to control indoor environments. All these points of view were treated in depth in this book. This book aims to be an updated link between applications of quality control and its developments to serve as a guide for responsible person of process control and researchers in these areas.