Performance should include

running routine warm-up cycles
inspecting and assessing the general condition of an assigned machine tool
making routine adjustments as authorized, or reporting problems to supervision
carrying out daily, weekly, and/or monthly routine upkeep chores cited on checklists for a given machine tool
filling out the history forms for tracking maintenance
making a brief oral report explaining the condition of the machine tools and the actions taken
keeping a maintenance and repair record on each machine tool
using a refractometer to measure coolant levels
identifying options for dealing with tramp oils.

What are the benefits of preventive maintenance?
Why is documentation of maintenance important?
Why is proper care, usage, and storage important for prolonging the life of a machine tool?
What is the difference between detergent and nondetergent oils?