A3 model

Step 1. Identify the problem

A problem can be one of 3 things: (1) deviation from the standard (2) gap between the ideal and reality (3) unfulfilled customer need

Step 2. Break down the problem

Step 3. Set the target

Step 4. Analyze the root cause

Use five whys technique to uncover the root cause: gather affected representatives => state the problem => ask 5 whys problems to get to the root

Step 5. Develop countermeasures