6. Rigor matrix

Find the cell that matches your system. Universal rules apply in every cell; the master rule scales how strictly. Conditional rules apply in every cell where their condition is true. Risk-scaled rules apply only in the cells listed. MUST rules apply whenever their IF-condition is true.

	Low uncertainty	High uncertainty
Low consequence	all universal rules, conditional rules whose condition is true. Checker level: peer (P56).	all universal rules, conditional rules whose condition is true, P16, P31, P68. Checker level: peer (P56).
High consequence	all universal rules, conditional rules whose condition is true, P42, P43, P45, P46, P59. Checker level: external (P56).	all universal rules, conditional rules whose condition is true, all risk-scaled rules. Checker level: external (P56).