Abstract
The functional safety focuses on the hardware, software, and human which construct
the safety-related control system, and specifies the requirements corresponding to the severity of the
damage foreseen when the safety-related control system becomes malfunction. In order to achieve
the functional safety, practical use of the basic researches accumulated in the past in fields, such
as dependability, reliability, electricity, machinery, software, and management of an organization, is
essential. This paper describes the relation of the technology of dependability and risk management
fields across boundaries in functional safety.
