IFAB employs accredited engineers to carry out reliability analyses and designs for fire safety systems. Reliability engineering is a common practice used in a wide variety of industries and applications, but so far its use has been limited in relation to fire protection. This is changing since fire protection systems are of vital importance for the protection of life and property. Reliability engineering has to be an integral part of all fire safety systems used for example in rail or highly hazardous applications such as the nuclear power and oil industries. Reliability engineering focuses on the ability of a fire protection system or component to function under expected conditions for a specified period of time. The process also typically considers maintainability and safety, since they are closely linked to reliability. The same tools can also be used to determine life cycle costs.