"principle level" is correct and usable in written English.
The phrase is often used to describe the foundational ideas or goals that are the basis of something. For example, "Our goal for this project is to maintain our principle level of customer service."
Housing has been acknowledged as one of the principle levels at which neighborhood deprivation occurs in recent literature.
The original goal of sympathetic cooling of a molecular ion has been demonstrated at the proof-of-principle level [19, 41, 70].
We have undertaken systematic calculations of transition metal sulfides bulk crystal structures, electronic and energetic properties at the first principles level (DFT, GGA, PW-USPP, PBC, implemented in the Vienna Ab initio Simulation Package, VASP).
For people who learn more slowly than others, they can apply the Pareto Principle to level the playing field.
To apply the closure principle, local level α tests for the elementary hypotheses, and the intersection hypothesis have to be defined.
In principle, many levels of such nesting are possible while maintaining a probabilistic approach.
Therefore, as a general principle, dose levels should be selected as those doses where variations in the parameters result in the largest possible changes of the resulting response.
In principle, lower levels of leisure time sitting may strengthen protective effects of higher physical activity, either through independent physiological mechanisms [ 6] or as a marker for greater engagement in low-intensity activity, such as standing [ 34].
So, although we have principles at each level, those principles are not themselves complete entities at that level.
The authors present a new method, called the hypercone method, based on the principles of level-2 methods.
