Developing, documenting, and maintaining process knowledge is one of two elements in the Risk Based Process Safety (RBPS) pillar of understanding hazards and risk. Developing a high level of Process Knowledge Management throughout the organization is key to operating a safe and profitable manufacturing facility in compliance with applicable regulations and near-by residential area inhabitants needs and expectations. The knowledge element of RBPS primarily focuses on information that can easily be recorded in documents, such as (1) written technical documents and specifications, (2) engineering drawings and calculations, (3) specifications for design, fabrication, and installation of process equipment, and (4) other written documents such as safety data sheets (SDSs). The knowledge element also involves work activities associated with compiling, cataloging, and making available a specific set of data that is normally recorded in paper or electronic format. The main product of the knowledge element is (1) accurate, complete, and up-to-date information to support process safety activities at each life cycle phase and (2) a system to store and retrieve this information. However, knowledge implies understanding, not simply compiling data. The book will focus on the need for, the importance of, and the use of that knowledge and understanding.