The safe operation of an asset is one of the most important things to ensure. We all know that the possible consequences of an incident may involve damage to people, asset, and the environment. Process industries are using various techniques to identify and prevent hazards and incidents. So how can we sleep well at night, and know that the safety has been maintained using the best practices available? One approach is to use hazard study techniques to understand and prepare for the different risks. This is only one part of a complex challenge where several important factors can have an influence, such as training, safety culture, workload, and process design.