From an article at sciencealert.com:
Brain surgery is precision business, and one slip can spell doom for affected patients. Even in one of the most skilled jobs in the world, human error can still be a factor.
Researchers from the University of Utah are looking to provide less opportunity for those errors to occur. A robot that the team is developing is able to reduce the time it takes to complete a complicated procedure by 50 times.
According to CNN, the robot can reduce the time it takes to drill into the skull from two hours to two-and-a-half minutes.