1. Methods or procedures that have not yet been tried, proven, or validated through experimentation or practical application
The startup decided to use untested techniques in their product development, which proved risky.
A startup decidiu usar técnicas não testadas no desenvolvimento de seu produto, o que se mostrou arriscado.
2. Experimental or novel approaches lacking empirical evidence of effectiveness
The surgeon was hesitant to employ untested techniques on such a critical patient.
O cirurgião hesitou em empregar técnicas não testadas em um paciente tão crítico.