The 80/20 Principle asserts that there is an
inbuilt imbalance between inputs and outputs, causes and consequences, and
effort and result. It states that a minority of causes, inputs or effort
usually lead to a majority of the result, outputs or rewards. A few things
are important; most are not.
A good benchmark for this imbalance is
provided by the 80/20 relationship: a typical pattern shows that
80% of outputs result from 20% of inputs; that 80% of
consequences flow from 20% of causes; or that 80% of results
come from 20% of effort. It reflects relationships in nature,
which are an intricate mixture or order and disorder, or
regularity and irregularity.