Lean Six Sigma Refresher
LSS A3 Template
In Lean Six Sigma (LSS), an A3 report is a structured, one-page tool used for problem-solving, decision-making, and continuous improvement. It helps teams clarify issues, analyze root causes, and propose solutions using a visual and logical format.
📄 What Is an A3 Report?
Named after the A3 paper size (11x17 inches), the report condenses complex problems into a single, readable page.
Originated from Toyota’s lean manufacturing system, it’s now widely used in Lean Six Sigma for process improvement and strategic planning.
🧠 Core Purpose in Lean Six Sigma
Problem Solving: Guides teams through the Plan-Do-Check-Act (PDCA) cycle to resolve issues methodically.
Root Cause Analysis: Encourages data-driven investigation rather than assumptions.
Clear Communication: Serves as a visual summary for stakeholders, promoting alignment and transparency.
Continuous Improvement: Documents lessons learned and actions taken to prevent recurrence.
🧩 Typical A3 Structure
Background – Context and why the issue matters.
Current Condition – Visuals or data showing the problem.
Goal Statement – Desired outcome or target.
Root Cause Analysis – Tools like 5 Whys or Fishbone diagrams.
Countermeasures – Proposed solutions.
Implementation Plan – Who, what, when.
Follow-up – Metrics, results, and sustainability checks.
✅ Benefits in LSS Projects
Improves decision-making by focusing on facts and logic.
Reduces waste by eliminating unnecessary information and actions.
Builds team capability through collaborative problem-solving.
Standardizes improvement efforts across departments or projects.
🔧 Use Cases
Process bottlenecks
Quality defects
Customer complaints
Operational inefficiencies
Strategic planning
You can think of the A3 as a storyboard for solving problems—it forces clarity, discipline, and accountability.