Interaction

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 other methods to design to optimize human well-being and overall system performance.

In design of experiments, a matrix where the rows represent individual experimental treatments. Depending on the designed experiment, it may be possible to extend the matrix using deduced levels of other functions of the factor levels (such as interaction, quadratic terms, etc.

In design of experiment when using factional factorials, it is the length of the shortest word in the defining relation. It is a measure of the aliasing among the main effects and the two-way and higher interactions.

The interaction of stress and resistance to failure over time.

A systematic method to assess the risks of a product or process design along with interactions in terms of product or process functional specifications.