Verb / Good
tinker - To attempt to repair or improve something in a casual way, often to no useful effect

Mitch tried to tinker with his computer before realizing that it was more broken that he had thought, and that he had to bring it to the computer store to have a professional repair it.
streamline - To design or shape something to reduce resistance to motion for speed or smooth flow; or to improve the efficiency of a process by simplifying or eliminating unnecessary steps.

We need to streamline the hiring process so it doesn’t take so long to bring in new employees.