RBI as a risk-based approach focuses attention specifically on:

According to API 580, Section 4.3:

“RBI as a risk-based approach focuses attention specifically on the equipment and associated damage mechanisms representing the most risk to the facility.”

This confirms that the correct focus of RBI is on the equipment and the damage mechanisms that pose the greatest risk—making Option A correct. Other options are examples of traditional inspection strategies, not the defining focus of RBI.