Explain clearly, with specific examples, where performance is falling short. Avoid vague statements like "needs to try harder" — be precise about what good performance looks like and how it differs from what's happening now. Let the employee respond and give their perspective; there may be a reason you're not aware of, such as unclear training, unrealistic targets, or a personal circumstance.
💡 Tip: Ask the employee what support they think would help, not just what you think they need — buy-in makes the plan far more likely to succeed.