Human Factors is a scientific field focusing on the relationship between people, technology, and organization to ensure that services and products are produced safely and effectively. Human factors are an interdisciplinary field encompassing various topics, such as psychology, technology, engineering sciences, and sociology, organizational and management theories. Therefore, human factors can best be described as encompassing everything from ergonomic issues related to the design of systems and displays to complex relationships between management’s way of communicating its objectives and how it is propagated in the organization affecting normal work in the organization. Even though people are no longer considered the direct causes of why accidents occur, they still play a role in how a system may collapse and how a system can recover from the disturbance(s). This is simply because the human is an indispensable part of all complex systems. Previously, the safety focus was on the human role at the sharp-end, and now it is clear that humans play an essential safety role at the blunt-end. From the initial design to maintenance, people must be considered at all levels, including commissioning, inspection, regulations, and decommissioning to a system’s operation.