# Ergonomics > The scientific discipline concerned with the understanding of interactions among humans and other elements of a system, and the profession that applies theory, principles, data, and methods to design in order to optimize human well-being and overall system performance. The scientific discipline concerned with the understanding of interactions among humans and other elements of a system, and the profession that applies theory, principles, data, and methods to [design](https://wiki.g15e.com/pages/Design.txt) in order to optimize human well-being and overall system performance.