A3 Problem Solving Template

The A3 Project Report tool is ideal for systematically structuring and standardizing your problem-solving process. This free template aims to assist you in tackling workplace problems.

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↻ Updated February 2026

About this Template

The A3 Problem Solving Report is more than just a template; it is a way of thinking. Developed by Toyota, this tool forces you to capture an entire improvement project, from the problem statement to the final result, on a single sheet of ISO A3 paper (11x17 inches).

The layout follows the logical flow of the PDCA (Plan-Do-Check-Act) cycle. By restricting your report to one page, you are forced to be concise, visual, and focused only on the data that matters. It eliminates the "fluff" found in 50-page PowerPoint decks and helps stakeholders grasp the full story in under 5 minutes.

This Excel template provides a clean, pre-formatted structure for the 7 key steps: Background, Current Conditions, Goal, Root Cause Analysis, Countermeasures, Effect Confirmation, and Follow-up Actions. It is the ultimate tool for mentoring Green Belts and driving organizational alignment.

Why "A3"? It is named after the international paper size (approx 11" x 17"). The philosophy is that if you can't explain your problem on one sheet of paper, you don't understand it well enough.

Visual Thinking

See the whole story at a glance. The single-page view highlights logical gaps instantly.

Scientific Method

Built on the Plan-Do-Check-Act framework to ensure solutions are tested and sustained.

Root Cause Focus

Dedicates significant space to the "Why" (Analysis) before jumping to the "What" (Solution).

Mentoring Tool

Designed to facilitate dialogue between the problem solver and their manager or coach.

The A3 Problem Solving Flow

A3 is not just a paper size; it is a thinking process. Follow these 4 phases to move from a vague problem to a sustained solution.

Phase 01

Define the "Gap"

This is the "Left Side" of the A3. You must clarify the Current State using data, not opinions. Visually demonstrate the gap between where you are and where you need to be.

Background: Why does this matter to the business?
Current State: Go to Gemba and observe the actual process.
Target State: Set a specific goal (e.g., improve from 80% to 95%).

The Rule:

Do not mention solutions yet. If you write "Lack of training" here, you are guessing. Just describe the problem.

Phase 02

Root Cause Analysis

Before fixing anything, you must understand why the gap exists. Use a Fishbone Diagram to brainstorm factors (Man, Machine, Material, Method) and the "5 Whys" to drill down to the root.

Fishbone: Cast a wide net to capture all potential causes.
5 Whys: Drill deep. (Why? -> Because X. -> Why X? -> Because Y.)
Validation: Can you turn the problem on/off by manipulating this cause?

Warning:

Avoid "Band-Aid" fixes. Addressing symptoms won't stop the problem from coming back next week.

Phase 03

Countermeasures

This begins the "Right Side" of the A3. Now that you know the root cause, propose specific actions to eliminate it. This is your implementation plan.

Action Items: What specifically will be done?
Owners: Who is responsible for each task?
Due Dates: When will it be completed?

Evaluation:

Ensure your countermeasures actually address the root causes found in Phase 2. If they don't link up, the plan is flawed.

Phase 04

Check & Sustain

Did the plan work? Compare your new data against the targets set in Phase 1. If you succeeded, you must standardize the new process to prevent backsliding.

Check Results: Measure the process again.
Standardize: Update SOPs, retrain staff, and share knowledge.
PDCA: If the target wasn't met, Plan-Do-Check-Act again.

Standard Work:

Without a new standard, the process will revert to the old way within 30 days.

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FAQ

Frequently Asked Questions

Why is it called an "A3"?

It is named after the international paper size A3 (approx. 11" x 17"). Toyota realized that if you cannot explain a problem on a single sheet of paper, you likely don't understand it well enough. The size constraint forces you to be concise, visual, and focused only on data that matters.

When should I use an A3 vs. an 8D Report?

Both are problem-solving tools, but they have different focuses. 8D Reports are often compliance-driven and required by customers. A3 Reports are mentoring tools used internally to develop the thinking process of the problem solver. If your goal is to coach your team, use the A3.

Can I just jump to the Solution box?

No. The magic of the A3 is in the "Left Side" (Analysis). You must strictly define the Current State and verify the Root Cause before you move to the "Right Side" (Countermeasures). Skipping the analysis phase is the most common reason improvement projects fail.