Go/run like clockwork

Pro Tip 1/3

Used to describe something with accuracy and punctuality like a well-set clock.

The train service in our country goes like clockwork; it's always on time.

Pro Tip 2/3

Suggests a process without interruptions or unexpected problems.

Despite the tight deadline, the project ran like clockwork.

Pro Tip 3/3

Implies that success or smooth operation looks easy, even if behind the scenes it’s not.

She managed the conference so well, it all ran like clockwork.