Quality by Design (QbD) is a systematic approach to product development that emphasizes building quality into a product from the beginning. Instead of testing for quality at the end of the production process, QbD focuses on understanding the product and its manufacturing process to ensure consistent quality throughout. This approach helps identify potential issues early, reducing the risk of defects and improving overall efficiency. In pharmaceutical development, QbD involves defining the desired quality attributes and understanding how various factors influence these attributes. By using tools like risk assessment and design of experiments, companies can optimize their processes and ensure that the final product meets regulatory standards and customer expectations.