Quality assurance and quality control together play an important role in assuring the
quality, safety and efficacy of a pharmaceutical product. Implementation of effective quality
assurance policies is a key for the success of a product. Quality cannot be maintained by
merely testing but needs to be built into the product. Since 21st century, there has been a
growing awareness regarding quality of pharmaceutical products. As a result,
pharmaceutical industries have adopted principles of total quality management, current
good manufacturing practices and various harmonized guidelines and practices.