to reinvent the wheel

to waste time learning how to do something when it is already known how to do it:

We don’t need to reinvent the wheel, we just need to hire someone who already knows how to make the system work.

You don’t need to reinvent the wheel. Read up on what others have done.

I don’t have to reinvent the wheel, but I will be cautious before I act.

Will others squander valuable time reinventing the wheel because existing data never saw the light of day?

I have dedicated myself to learning from other people’s experiences so that I do not waste time trying to reinvent the wheel.

‘We don’t try to reinvent the wheel and create new online resources,’ says Jacka.