The phrase "a first consideration is" is correct and usable in written English.
It can be used when introducing a primary point or factor that should be taken into account in a discussion or analysis.
Example: "In evaluating the project's feasibility, a first consideration is the budget allocation."
Alternatives: "a primary factor is" or "the main point is".
A first consideration is that we are intrinsically unable to determine an accurate 'true false positive rate' for the predicted PPIs, due to the fact that many PPIs have simply not been discovered and described yet.
A first consideration is that the assays were run on stored, rather than fresh, serum samples.
A first consideration is whether or not we think that research synthesis fits a qualitative approach that focuses primarily on the idiographic or unique contextual experience, or whether synthesis removes us too far from the idiographic to reveal truth?
As had been the case in every crisis in his life, a first consideration was to have people loyal to him around him, aides and allies who could be counted on to take his orders without question.
A second consideration is durability.
A third consideration is that sizable partisan minorities would be displeased with either winner.
A third consideration is whether private investments also create benefits for society through spillovers or externalities.
A second consideration is whether drone strikes must still be carried out by the CIA or should be transferred to the Pentagon's Joint Special Operations Command.
A second consideration is that the ketamine abusers in this study have used ketamine for a number of years, with some individuals beginning to use ketamine during adolescence, which is a stage of development known to involve significant brain plasticity(Blakemore and Choudhury, 2006).
A second consideration is as follows.
A second consideration is defining the benefits for the project.
