Risk-based inspection

Risk-based inspection, RBI, is a method that targets survey and inspection effort at the items and structures most likely to fail and most serious if they do, rather than inspecting everything on a fixed interval. Class societies apply it to schedule close-up examination and thickness measurement on the tanks and frames with the worst corrosion history, and port state control regimes use risk profiles, built from ship age, type, flag, recognized-organization record, and past detentions, to pick which ships to board and how deeply. The Paris and Tokyo MoU New Inspection Regime ranks ships as low, standard, or high risk to set inspection frequency.