01/05/05  ssprocdesrv103.doc  Attachment 1  Example Risk Assessment Matrix  RISK ASSESSMENT MATRIX  Severity  Likelihood  Negligible Marginal Critical Catastrophic Frequent  Probable  Occasional  Remote  Improbable  Severity Scale Definitions  Catastrophic  Results in fatalities and/or loss of the system.  Critical  Severe injury and/or major system damage.  Marginal  Minor injury and/or minor system damage.  Negligible  Less than minor injury and/or less than minor system damage.  Likelihood Scale Definitions  Frequent  Individual  Likely to occur often.  Fleet Continuously experienced. Probable  Individual  Will occur several times.  Fleet  Will occur often.  Occasional  Individual  Likely to occur some time.  Fleet  Will occur several times.  Remote  Individual  Unlikely to occur, but possible.  Fleet  Unlikely but can reasonably be expected to occur.  Improbable  Individual  So unlikely, it can be assumed it will not occur.  Fleet  Unlikely to occur, but possible.  7 