1. A method or procedure that has been demonstrated to be effective through testing, evidence, or experience
This is a proven technique that has been used successfully for decades.
Esta é uma técnica comprovada que tem sido usada com sucesso há décadas.
2. A validated approach supported by scientific evidence or documented results
The doctor recommended a proven technique for treating the condition.
O médico recomendou uma técnica comprovada para tratar a condição.