1. ESSA Grading Criteria
Can the finding lead to a mishap?* No
Violation of DoD, DON or MCO? No
Violation of Local Orders or SOPs? No
No Finding
Yes
Yes
Violation of a Site Plan or Deviation? No
Yes
Yes
Yes
Does the violation endanger personnel, equipment or facilities?
MCO P5102.1B
Class A Mishap. The resulting total cost of damages to DoD or non-DoD property in an amount of $2 million or more; a DoD aircraft is destroyed; or an injury and/or occupational illness result in a fatality or permanent total disability.
SEVERITY LEVEL A
Class A
Yes
Level 1 No
Class B Mishap. The resulting total cost of damages to DoD or non-DoD property is $500,000 or more, but less than $2 million. An injury and/or occupational illness result in permanent partial disability or when three or more personnel are hospitalized for Inpatient care (beyond observation) as a result of a single mishap. No B
Class B
Yes
Level 2 No
Class C Mishap. The resulting total cost of damages to DoD or non-DoD property is $50,000 or more, but less than $500,000; an event involving one or more DoD personnel that results in one or more days away from work.
Negative operational impact? C
Class C
Yes
Yes
Level 3 No No
Level 4
* Repeat findings will be assigned the same RAC as previously assigned

2. Defining Probability in a Qualitative Risk Assessment
Risk Probability
Defining Probability in a Qualitative Risk Assessment
FREQUENT
Subcategory A
Likely to occur immediately or within a short period of time.
Initiated by one causal factor (action)
PROBABLE
Subcategory B
Probably will occur in time.
Initiated by two causal factors (actions)
OCCASIONAL
Subcategory C
May occur in time.
Initiated by three causal factors (actions)
REMOTE
Subcategory D
Unlikely but possible
Initiated by four causal factors (actions)
IMPROBABLE
Subcategory E
So unlikely non-occurrence can be assumed
Initiated by five or more causal factors (actions)

3. DoD Risk Assessment Matrix
MIL-STD-882E RAC MATRIX
Risk Assessment Code – Applied to Finding
DoD Risk Assessment Matrix
(MIL-STD-882E)
SEVERITY
CATASTROPHIC
CRITICAL
MARGINAL
NEGLIGIBLE
PROBABILITY 1 2 3 4
FREQUENT A
1-A HIGH
2-A HIGH
3-A SERIOUS
4-A MEDIUM
PROBABLE B
1-B HIGH
2-B HIGH
3-B SERIOUS
4-B MEDIUM
OCCASIONAL C
1-C HIGH
2-C SERIOUS
3-C MEDIUM
4-C LOW
REMOTE D
1-D SERIOUS
2-D MEDIUM
3-D MEDIUM
4-D LOW
IMPROBABLE E
1-E MEDIUM
2-E MEDIUM
3-E MEDIUM
4-E LOW

4. ESSA Grading Criteria HIGH SERIOUS MEDIUM LOW
1 HIGH Risk Findings UNSAT*
5 SERIOUS Risk Findings = 1 HIGH**
5 MEDIUM Risk =
1 SERIOUS**
5 LOW Risk Findings =
1 MEDIUM**
* One HIGH risk finding or equivalent in any program will result in a program UNSAT.
** RAC of findings do not change. Example shows weight of associated number of findings.