Node A6 · Acronym decoder
EARS
Easy Approach to Requirements Syntax
What it actually means
A set of five sentence templates for writing requirements — ubiquitous, event-driven (When), state-driven (While), optional (Where), and unwanted-behaviour (If/Then) — that forces each statement to declare its trigger and condition explicitly. Developed at Rolls-Royce for jet engine control requirements, it eliminates most ambiguity defects at the cost of slightly stilted prose.
Where you'll meet it
Requirements style guides; our requirements checker classifies statements against the EARS patterns.