2.3.2.3d - Margin of safety

Calculate and interpret margin of safety.

Use d - margin of safety to connect the rule to the data and decision in the question.

This matters because d - margin of safety determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply d - margin of safety to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: d - Margin of safety is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.