The phrase "a practical difficulty" is correct and usable in written English.
It can be used when discussing a real-world challenge or obstacle that affects the execution of a task or plan.
Example: "We encountered a practical difficulty in implementing the new software due to compatibility issues with our existing systems."
Alternatives: "a real challenge" or "a tangible issue".
But when we exceeded our target we decided to build a larger one," says Doyle. "There is a practical difficulty in the size and shape of the launch tube.
For Sykes, it poses a practical difficulty on the live stage, as he sometimes shifts from guttural growls and full on screams to singing in the space of one song.
However, this causes a practical difficulty in modelling such systems.
However, there is a practical difficulty in that it requires the inclusion of a large number partial waves and thus makes the numerical computation extremely challenging.
Although a practical difficulty always exists in implementing a growth strategy across national boundaries, policy coordination still seems feasible as long as the findings from the innovation input output matrix are shared.
However, a practical difficulty this technique faces is that soils in the field, unlike the sieved, repacked soil samples used in the laboratory, are generally moist and have uneven surfaces, especially after tillage.
Due to the concavity of sliding surfaces, a building supported on FPS isolators exhibits vertical fluctuation and vibrates as a simple pendulum having a constant vibration independent of the structural mass, which represents a severe practical difficulty that may lead to resonance failure as the FPS's period approaches the dominant period of the hitting earthquake (Murnal and Sinha 2004).
A serious practical difficulty arose when each term in the series, which had to be summed to obtain the value of an observed quantity, turned out to be infinitely large.
A major practical difficulty is accurately positioning the TMS coil within the MRI scanner for stimulating a particular area of brain cortex.
The lack of consensus on criteria for assessment of results is often ranked as a major practical difficulty of this kind of research.
However, a major practical difficulty associated with this approach is the large and erratic variability of quantile estimates with respect to the threshold value, which is not known a priori.
