Lean A3 Report Generator

A3 Report Generator

Create professional Lean A3 reports for all four types — Problem Solving, Proposal, Status Report, and Strategic Planning. Fill in each section, embed images, preview, and export as a print-ready PDF.

1. Select A3 Type

Problem Solving A3: Used for problems where a standard or ideal condition cannot be maintained. Requires quantified gap and root cause analysis. Accounts for 75–80% of A3s at Toyota.

2. A3 Header Information

3. Pareto / Priority Data (optional)

Enter your top categories and values (counts, costs, %). These render as a bar chart in the relevant sections of the A3 preview.

4. A3 Section Content — rich text supported, paste images with Ctrl/Cmd+V or use the image button in the toolbar

◀ PLAN (Left Side)

1. Background & Problem Statement

PLAN

State the problem clearly. Describe the gap: current performance vs. standard. Quantify the gap. Why is this important now?


2. Current Situation

PLAN

Describe the current state with data. Include: key metrics, process observations, Gemba findings, trend data. Use visual descriptions (charts, maps).


3. Root Cause Analysis

PLAN

Apply 5 Whys or Fishbone (6M). Identify the true root cause, not just symptoms. State: "Root Cause confirmed because [evidence]."


4. Countermeasures

PLAN

List proposed countermeasures that directly address the root cause. For each: What will change? Why will it work? What is the predicted effect?


DO / CHECK / ACT (Right Side) ▶

5. Implementation Plan

DO

Who does What by When. List actions with owner name, target date, and expected output.

ActionWhoWhenStatus

6. Effect Confirmation / Check Results

CHECK

Show before vs. after data. Was the gap closed? By how much? Use the same metric from Section 1.


7. Follow-Up & Standardisation

ACT

List actions to sustain results: SOP updates, training, control plan, error-proofing, audit schedule.


8. Reflections & Lessons Learned

ACT

Hansei: What went well? What was difficult? What would you do differently? What can be applied elsewhere?


A3 Writing Tips — How to Write Each Type Effectively

Visual first

Every section should aim to be visual — charts, maps, tables. If you can say it in a bar chart, do not write a paragraph. The reader should understand the A3 in 3 minutes.

One story, left to right

The A3 tells a complete PDCA story: problem → cause → solution → result → sustain. A reader should follow it from left to right without explanation.

Quantify everything

Avoid qualitative statements without data. Not "quality is poor" but "defect rate is 4.7% vs 0.5% target — a gap of 4.2%." Every section should reference a number.

Gap statement is essential

Every A3 must have a clear gap statement: "Current state is X. Target is Y. Gap is Z." This single sentence drives the entire A3.

Gemba first

Never write a Problem Solving A3 from a conference room. Go observe the process, measure it, talk to the operators.

One A3, one problem

Resist the temptation to scope too broadly. If the A3 has more than one clear problem statement, split it into two A3s.