A3 Problem Solving
A3 problem solving is a structured method that documents a problem, its analysis, and the proposed countermeasures on a single A3-sized sheet. The constrained format forces clear thinking and follows the plan-do-check-act cycle.
Named after the paper size, the A3 walks through background, current condition, goal, root-cause analysis, proposed countermeasures, an implementation plan and follow-up — all on one page. The discipline of fitting it on a single sheet strips out waffle and exposes weak logic. As much a coaching tool as a report, the A3 develops problem-solving capability in its author while building organisational consensus around evidence-based countermeasures.