How should I prepare a conversation about a repeated mistake?

Question

Accepted Answer

First establish the relevant technical facts and consider whether instructions, materials, equipment or conditions contributed. Then ask Em to help you discuss the observed pattern without beginning with a conclusion about the worker's attitude. Em can help you separate the observable mistake from assumptions about attitude, prepare questions about what happened and make the required standard clear. If there is a technical root cause, that becomes part of the operational follow-up rather than being confused with the person's character.