Risk assessment using HAZOP, FMEA and FTA. FMEA, FTA and HAZOP are international standard design review method from IEC. These are using not only Design Review but also Safety Analysis.
We propose that HAZOP are used on FMEA failure and FTA fault for comprehensive finding. In one study are based 3 people team one hour. 3 times studies on a day changing people and 3 methods.