Table A.2 lists three techniques for making the requirements specification clear and precise: modelling (Table A.17), structured methodology (D.52) and decision tables (D.13), each R at Basic Integrity and SIL 1 and 2 and HR at SIL 3 and 4. The specification describes the problem in natural language plus whatever formal or semi-formal notation is needed, and at least one of the three techniques is chosen to suit the integrity level.
This control maps to 2 controls across 2 other frameworks. If you already hold one of them, the evidence you collected for it is the starting point here rather than new work.
Every mapping shown was judged rather than inferred from wording similarity, and the ones that failed review are published too. See the coverage reports and what was rejected.
The graph holds this control, the 2 it maps to, and the evidence behind each claim, over MCP and REST.