# A3 Problem Solving

**URL:** https://kaizumi.com/dictionary/a3-problem-solving

**Description:** A3 Problem Solving is a structured approach that documents the problem-solving process on a single 11x17 inch (A3) page.

**Category:** lean-tools

**Tags:** problem-solving, foundational

## Definition

A3 Problem Solving is a structured problem-solving methodology that documents the entire process—from problem identification through root cause analysis to countermeasures and follow-up—on a single A3 (11x17 inch) page. The format enforces concise, visual communication and logical thinking. A3s typically include: background, current condition, target condition, analysis (often 5 Whys), countermeasures, implementation plan, and follow-up. Beyond the document, A3 develops problem-solving capability through the coaching conversation between author and mentor.

## Examples

### Manufacturing

> A quality engineer developed an A3 for a recurring defect issue. The left side showed the problem: defect rate, trend, and gap from target. The center showed analysis: 5 Whys revealing that a fixture had worn beyond tolerance. The right side showed countermeasures: fixture replacement plus preventive maintenance schedule. Follow-up tracked defect rate returning to target.

### Healthcare

> A nurse manager created an A3 for patient falls in a unit. The document showed current fall rate versus target, analysis revealing patterns (mostly at night, often during bathroom trips), and countermeasures (hourly rounding, bed alarms, bathroom assist protocols). Follow-up showed fall rate reduction.

### Administrative

> A team leader developed an A3 for invoice processing errors. The document visualized error rate and impact, analyzed causes to find unclear guidelines and training gaps, proposed countermeasures including revised procedures and training, and tracked error rate improvement.

## Key Points

- The A3 format forces concise, visual, logical communication
- A3s follow PDCA thinking: understand, analyze, plan, do, check, adjust
- The coaching conversation around the A3 develops problem-solving capability
- A3s document thinking process, not just conclusions

## Common Misconceptions

**A3 is just a report format.** The A3 document captures structured thinking; the real value is the problem-solving process and the coaching conversation. A well-formatted document that doesn't reflect rigorous thinking misses the point.

**A3s should be created by experts.** A3s develop capability by having people closest to problems work through them with coaching. The mentor guides thinking but doesn't do the analysis.

## Try It

Draft a real A3 right here. The guided builder walks you through each section — background, current condition, target, root-cause analysis, countermeasures, and follow-up — on one structured page you can print or export.

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## Play It

Put A3 thinking to work: **A3 Investigator** drops you into a factory crisis and walks you from problem statement through root cause to countermeasure.

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## See Also

- [A3 Problem Solving: Watch an A3 Get Built](/guides/a3-problem-solving) - Interactive guide to the thinking behind the document

Source: https://kaizumi.com/dictionary/a3-problem-solving
Licence: free to quote and cite with attribution to Kaizumi.