As Keon Mcewen commented, the FCI method is a quantified method of calculating the risk. It allows researchers to break down risk in three sections.
Moreover, the FCI method enables them to quantify and measure risk based on the critical functions, inter-connections and the identities that access them.
Rick Scott, P.E. Senior technical Advisor, noted that
When untrusted identities can access critical functions through digital connection, then cyber risk exists.
Finally, ABS Smart Solutions received the received the 2019 SMART4SEA Cyber Security Award for this methodology to measure cyber security risk associated with operational technology, providing marine and offshore clients a calculated risk index for vessels, fleets and facilities.