This book presents select proceedings of HSFEA 2023. It describes the concept of risk and risk assessments. The scientific field of risk assessment and risk management is young. Contributions included in this book cover fundamental ideas and principles on how to appropriately assess and manage risk. These ideas and principles still largely form the basis for the field today—they are the building blocks for the risk assessment and management practice seen since the 1970s and 1980s. However, the field has developed considerably ever since. New and more sophisticated analysis methods and techniques have been developed and risk analytical approaches and methods are now used in most societal sectors. As an illustration of this, consider the range of specialty groups of the Society for Risk Analysis (www.sra.org) covers inter alia: Dose response, ecological risk assessment, emerging nano-scale materials, engineering and infrastructure, exposure assessment, microbial risk analysis, occupational health and safety, risk policy and law, and security and defence. This book also covers the advancement improvements made in fundamental issues for the field in recent years, and they are of special interest due to the potential to influence a broad set of applications. The book can be a valuable reference for researchers and professionals interested in sustainable construction and allied fields.