I n a real engine a honeycomb structure is impractical.
In addition, most real world domains are so complex that providing a complete set of rules is impractical or impossible.
In many seed testing situations, the number of tested seeds required to minimize producer's and consumer's risks may be impractical given the available testing resources.
Conversely, smaller depth increments increase the potential for detecting change, but increase sampling and analysis demands, thereby rendering them impractical for most studies.
However, rendering a terrain at full resolution is impractical for terrains of any significant size.
However, to provide sufficient cases for analysis of maternal age and seasonal variations would require a very extensive and prolonged survey which might prove impractical.
Even if they can be identified, monitoring numerous tiny firms may simply be impractical for chronically under-manned and under-funded municipal regulatory agencies.
Note that h is not the measured overall shell height, as direct measurement is impractical.
