# Tag Info

"Fine-tuning" is a situation in which the fundamental parameters in a theory must be "fine-tuned", i.e. precisely chosen, in order for a theory's predictions to agree with experimental data.

"Fine-tuning" is a situation in which the fundamental parameters in a theory must be "fine-tuned", i.e. precisely chosen, in order for a theory's predictions to agree with experimental data. Although fine-tuning has played a role in physics for decades, it remains a contentious issue. Fine-tuning is closely related to the idea of naturalness in high-energy physics and the hierarchy problem.