This answer uses only the ten hundred words people use most often. And "meliorology".
Meliorology is learning about how to help people to do better by thinking about how they work.
First, it is about talking and listening with people about problems at work and thinking about what they can do to help. Sometimes, just talking about things makes it better.
Other times, other people have found ways to fix problems which are almost the same, so meliorology helps think about what's different and work out whether they can use the same idea to fix this problem.
Meliorology sometimes means trying ideas out on a computer because this is easier and quicker than trying an idea in the real world.