Figure 6: Safety Risk Assessment Matrix
Risk Assessment Matrix
Severity - Likelihood
Frequent (A)
Catastrophic (1) - High
Critical (2) - High
Marginal (3) - High
Negligible (4) - Medium
Probable (B)
Catastrophic (1) - High
Critical (2) - High
Marginal (3) - Medium
Negligible (4) - Medium
Occasional (C)
Catastrophic (1) - High
Critical (2) - Medium
Marginal (3) - Medium
Negligible (4) - Low
Remote (D)
Catastrophic (1) - Medium
Critical (2) - Medium
Marginal (3) - Low
Negligible (4) - Low
Improbable (E)
Catastrophic (1) - Medium
Critical (2) - Low
Marginal (3) - Low
Negligible (4) - Low
