acid test

The product launch will be the **acid test** of our new design.

Idiom Science

Meaning

a crucial test that proves the value or success of something

The product launch will be the acid test of our new design.

A procedure intended to establish the quality, performance, or reliability of something.

a chemical substance that reacts with bases and has a sour taste

The truth can be painful to hear.

something very easy to do

to agree with someone

to have a surgical operation

a secret agreement made by powerful people

too busy or overwhelmed to handle more tasks