Each of us might have our own way to approach that question. Ohno's method was to do just what my grandsons were doing a few days ago. He didn't read books or consult experts or worry about how other people might solve the problem. Instead, he used what was his preferred learning style. He went out on the shop floor just to watch and consider what he saw.
Discovery learning is like play.
It is fun. It can also be the most effective and competitive thing you can do for your process. In Ohno's case, it was revolutionary. Just see what you can discover. Don't imitate what works for others.