Aeronautical Terms beginning with R

Residual Risk

The remaining risk after system safety efforts have been fully employed. It is not necessarily the same as acceptable risk. Residual risk is the sum of acceptable risk and unidentified risk. This is the total risk passed on to the user.

Risk

The future impact of a hazard that is not eliminated or controlled.

Risk Assessment

An approach to managing uncertainty. Risk assessment is a quantitative value assigned to a task, action, or event.

Risk Assessment Matrix

A tool used to see the relationship between risk likelihood and risk severity to determine an overall level of risk, measured as low, medium, serious, or high.

Risk Likelihood

The probability of encountering risk categorized as probable, occasional, remote, or improbable.

Risk Management

The part of the decision-making process which relies on situational awareness, problem recognition, and good judgment to reduce risks associated with each flight.

Risk Mitigation

The process of reducing risk likelihood and severity to lower levels.

Risk Severity

The magnitude of consequences of risk categorized as catastrophic, critical, marginal, or negligible.

Root Cause

The underlying reason that leads the pilot or aircraft toward the probable cause of an accident.