Perfect is the enemy of good

Business Design

For example, it commonly takes 20% of the full time to complete 80% of a task while to complete the last 20% of a task takes 80% of the effort. Achieving absolute perfection may be impossible and so, as increasing effort results in diminishing returns, further activity becomes increasingly inefficient.

https://en.wikipedia.org/wiki/Perfect_is_the_enemy_of_good

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