This skill concerns mechanical and robotics knowledge. You may need to know how mechanical parts interact, how motors work, or how to use motor drivers and controllers.
Noob - You will be required to put together a robotics kit. Necessary parts are included and steps will be easy to follow. You also might encounter basic robotics components like bearings, mounts, or other hardware and need a general idea of how it goes together.
Rookie - You will be required to know some basics about motors, basic motor drivers and how simple robotic motion can be accomplished.
Competent - You may need an understanding of servo motors and how to drive them. Additionally, you may need some fundamental understanding of motor controllers.
Experienced - Your experiences should include working with stepper motors and feedback system. You may need to understand how encoders and more complex control systems work.
Expert - In addition to having a solid foundation in robotics, you will need to know how sensors integrate with complex robotic systems. You will need to understand how to implement IMUs, UAV controllers, etc.
Want to advance your skill levels? Check out the Tutorials Section over at learn.sparkfun.com!