Depends on the job itself.

One of my previous positions I made a study guide and on boarding course for new technicians. At first it required a bachelors degree or minimum of two years working in electrical/mechanical or automotive/train industry. After so many unsuccessful candidates HR asked me what is the training process like, I pretty much said “oh this stuff is easy, 3 weeks of x, y and z and they’ll be good”.

So HR manager let me make a study guide and training material. With the help of other engineers and senior technicians we made a screener test and a hands on test. Eventually we hired two high school graduates, one trade school graduate and a man with no degrees but experience as a mechanic.

This is my go to response whenever I get asked whats your greatest professional achievement so far in an interview.

The position in question was entry level train technician for an international corporation. It hasn’t been implemented at any other site besides the one I was at. But its a good start