D2 – Defining and understanding the problem
Using the 8D method to eliminate the risk of a problem recurring

Precise description of the malfunction (defect).

Define the conditions under which it appears.

Ensure that the "8D" team shares the same understanding of the problem.

Understand how the customer perceives the problem.

Try to reproduce the fault. Record measurements.

Identify the effects, characterize the scope of the problem.

Identify associated records (drawings, inspection sheet, report, complaint sheet, technical sheet, etc.).