The Safety Analysis and Risk Mitigation Process  Section 3  *Risk is high when there  is a single point or  common cause failure. 3.6_SMSM_201607  Originally published July 2016  Uncontrolled copy when downloaded 5 3  Figure 3.7: Risk Matrix  Low Medium High High High Low Medium High High High Low Medium High High Low Low Low Minimal 5 Minor 4 Major  3 Hazardous 2 1 Catastrophic Low Low Medium High High* Frequent A Probable B Remote C Extremely  Remote D Extremely Improbable E Medium Severi Likelih t oo y d Medium Medium Medium