What is the purpose of a safety case?

The primary use of safety cases in an occupational health and safety context is in the process industries. The approval process should also change at different stages of the lifecycle, depending on the purpose of the Security Case Report (see Additional Guidance: Security Cases During the Project Lifecycle later in this document). A safety case should be reviewed when an existing product is to be reused in a new way, if this extends beyond the scope of the original evaluation.