What is A3 problem solving and how would you apply it to a sorting backlog issue?

• A. A three-page report focusing on costs only.
• B. A daily stand-up meeting agenda.
• C. A checklist used for equipment maintenance.
• D. A structured one-page problem-solving approach: background, current condition, goal, root cause, countermeasures, plan, and follow-up; apply by mapping backlog causes and actions.

Answer: (D)

A3 problem solving is a concise, visual Lean method that guides you through understanding a problem, setting a goal, identifying root causes, and planning countermeasures on a single, focused page. The format typically includes background, current condition, goal, root cause analysis, countermeasures, plan, and follow-up. This structure makes thinking explicit, aligns team members, and creates a traceable record of how the problem will be solved.

When applying it to a sorting backlog issue, start by capturing why the backlog matters (background) and what the backlog looks like today (current condition). Then set a clear objective, such as reducing the backlog by a specific amount or aging to a target by a date (goal). Next, drill into why items end up in the backlog (root cause analysis), using methods like 5 Whys to uncover bottlenecks, unclear sorting criteria, misrouted items, or resource constraints. Propose concrete countermeasures that address those causes—examples include clarifying sorting rules, improving triage and prioritization, implementing a more efficient routing process, adding temporary staff, or introducing automation or better tooling. Outline a concrete plan: who will do what, by when, and what metrics will track progress. Finally, specify how you’ll follow up to verify results and adjust as needed.

This choice is the best fit because it describes a single-page, structured problem-solving approach and shows how to apply it directly to map backlog causes to actionable steps. The other options describe things that aren’t about end-to-end problem solving on one page—such as a stand-up agenda, a maintenance checklist, or a cost-focused report—so they don’t capture the deliberate, iterative process that A3 uses.