Synopsis In the ever evolving field of information technology, every element of the software’s operational environment is in a state of constant flux: frequent changes in the hardware, operating system, cooperating software and client’s expectations are motivated by performance improvements, bug-fixes, security breaches and attempts to assemble synergistically ever more sophisticated software systems. With increasing applications of software, the complexity of the software has increased, and the magnitude of costs involved in software development and maintenance magnifies the need for a scientific foundation to support programming standards and management decisions by measurement. So, the measurement of software quality has become very important to both software vendor and the user. While developing or choosing software, one has to decide on the desired functionality and the level of quality of such software. Unless the desired level of quality is decided, one cannot measure it. To measure quality of software, it calls for quality models and metrics. A quality model defines quality, links together and defines various software metrics and measurement techniques that an organization can use. Quality metrics are used to evaluate the quality of the software. This book provides insights into the concepts of software quality measurement, techniques and approaches of measuring software quality, and explains various quality model, metrics and standards for software quality measurement.