Any organisation has a purpose, and in order to achieve it, it has a structure and resources.
Its structure starts from zero and achieves the purpose, by taking the raw material and turning it into the end result.
For instance, an education system starts with people who know nothing and brings them to know everything they need perfectly.
The organisation makes it a cyclical pattern: continuous, smooth, stable and effective; for instance, with each student.
A structure is composed of parts, and in order to operate the available resources must be allocated among its parts.
How to allocate them for it to function at its best?
Imagine you want to spin a heavy wheel: at the beginning, it is still, and your effort is at its peak; then, as it takes speed your effort decreases.
Resources must be allocated in the same way: the part of the organisation at the beginning of the cycle starts spinning the wheel, thus receives the biggest slice; the other parts, as from the beginning of the cycle they get closer to its conclusion and the wheel turns faster and faster, receive smaller and smaller slices.
The distribution of resources according to a given criterion (in the example, the inertia of the wheel, which varies gradually) is called weighted distribution.
An hour spent making the fundamentals known to one who knows nothing at all produces much greater results of the same hour spent making the last details known to one who already knows nearly everything.