Safety Engineering as a parallel process in the development of machinery and plant is the most underrated sector.
Why? The methodology requires work in a variety of disciplines such as mechanics, electronics and application software. In addition the required iterative process demands complete attention during the whole timeline through various stages.
When safety-related controls deliver their safety functions reliably, we talk of functional safety.
Risk assessment plays a central role with regard to the requirements made on functional safety. Which steps must be considered in risk assessment and risk reduction of machinery and how safety functions are to be assessed and verified is stated down in the Norms EN ISO 12100, 13849-1. This assessment of risk gives rise to the Safety Integrity Requirements (Performance Level PL).