change, if known. Trace through causes and solution states to arrive at a means of  distinguishing those measures that quantitatively (or only qualitatively) support declarations of  severity by the SRM panel. In the early stages of SRM for alternative concepts, there are  occasionally solution fragments and less than fully defined systems, making it difficult to assign  specific severity and likelihood ratings. Document assumptions and justifications for how  severity and likelihood for each hazard condition were determined. Describe whether the  alternatives are detailed enough at this stage in development to draw meaningful conclusions  about their differences with regard to safety. If additional information is required, describe when  and how any deferred analysis reaches a definitive answer, if possible. Describe any new data  collection methods required, and identify future decision points at which important measures are  likely to be available. Assess the acceptability of the safety risk associated with implementation of each alternative  under consideration. Document the assessments using Table D.2. ( Note : Each alternative  assessed has its own table.) Summarize any similarities and note any significant differences. Explain the level of confidence with the outcome by determining a rudimentary level of precision  with regard to the possible breadth of range of values that the SRM panel expressed. 4.2.7  Assess Each Alternative from a Safety Perspective  Hazard ID  Hazard Description  Cause  System State  Alpha-numeric identifier  (under 10 characters) Any real or potential  condition that can  cause injury, illness, or  death to people;  damage to or loss of a  system, equipment, or  property; or damage to  the environment  The origin of a hazard  An expression of the  various conditions,  characterized by  quantities or qualities,  in which a system can  exist  Any means currently reducing a  hazard’s causes or effects  A justification for each control, indicating its effect on the  identified hazard’s causes or effects  Effect  Severity  Rationale  Likelihood  Rationale  Initial Risk  The real or  credible  harmful  outcome that  has occurred  or can be  expected if the  hazard occurs  in the defined  system state  The  consequences  or impact of a  hazard’s effect  or outcome in  terms of  degree of loss  or harm  Explanation of  how severity  was  determined  The estimated  probability or  frequency, in  quantitative or  qualitative  terms, of a  hazard’s effect  or outcome  Explanation of  how likelihood  was  determined  The composite  of the severity  and likelihood  of a hazard,  considering  only controls  and  documented  assumptions  for a given  system state  Controls:  Initial Risk:  D_SRMGSA_202003 Originally published March 2020  Uncontrolled copy when downloaded  D-6 Table D.2: CSA Worksheet Categories 