1.3.3.1b - Product life cycle

Use the product life cycle and extension strategies.

Use b - product life cycle to connect the rule to the data and decision in the question.

This matters because b - product life cycle determines what can be inferred or chosen; begin with the stated conditions and keep the conclusion tied to the evidence.

Example: apply b - product life cycle to one small, clearly defined case, show the key step or comparison, and explain the result in words.

Boundary: b - Product life cycle is not a universal recommendation. Check the syllabus scope, assumptions, units and the limits of the evidence before generalising.