Future perfect continuous.

(grammar) A tense used to express an ongoing action completed after some time in the future. In English it is formed by use of will have been (or shall have been) and a present participle.

(grammar) A tense that expresses an unbroken action continuing at the present time, started in the past. In English it is formed by using have been with a present participle.

Insistence on perfection often precludes the opportunity for something worthwhile. / Insistence on perfection precludes gradual improvement through compromises.

plural of present perfect progressive

A scenario that can be found in market dominated by a monopoly firm which is able to charge each consumer different prices based on certain characteristics.

Alternative form of perfect is the enemy of good

A test that measures a binary value without error.

plural of perfect gold standard test

(idiomatic) To insist on the total realization of a goal and reject any compromise, thereby decreasing the chance of achieving even a part of that goal.