The phrase "a real constraint" is correct and usable in written English.
It can be used when discussing limitations or restrictions that are genuine and impactful in a given context.
Example: "The budget imposed a real constraint on our ability to expand the project as planned."
Alternatives: "a significant limitation" or "a genuine restriction".
But French exceptionalism is a real constraint.
"You've put a real constraint on the ways you can get gold into the rock".
Granted, deficits are a real constraint and we can't do everything, and prison reform won't come near to fully financing health care reform.
At least subliminally, it evokes memories of a dimly remembered era when Islamic law, as interpreted by scholars, acted as a real constraint on the power of rulers.
In such cases a fiscal contraction of 1% of GDP is more damaging to growth, knocking about 1% off output in the following year, according to the IMF's researchers.This lack of leeway is a real constraint on recovery.
When my colleagues and I have helped design markets and allocation procedures, we have often found that distaste for certain kinds of transactions is a real constraint, every bit as real as the constraints imposed by technology or by the requirements of incentives and efficiency.
In general, its market access commitments do not seem to impose any real constraint on Senegals border policy.
To solve these equations, we use the Gecode library (http://www.gecode.org), a state-of-the-art framework for Constraint Programming including a real intervals constraint system (Float variables).
To achieve a target bitrate in real constraint situations, such as within a specific channel bandwidth or within defined encoder and decoder buffer sizes, QP values must vary dynamically based on the complexity of the input video and the current bitrate.
The eyeglass machine was a great invention; unfortunately, the real constraint turns out to be testing eyes and writing accurate prescriptions rather than making the lenses.
Bureaucracy: The real constraint on starting a new business in India is its multiethnic, democratic and compassionate traditions, manifested in regulatory procedures that continuously hamper business operations.
