The specifications for a plastic liner for concrete highway projects calls for a thickness of 3.0 mm 0.2 mm. The standard deviation of the process is estimated to be 0.02 mm. The process is known to operate at a mean thickness of 3.0 mm.
(a) What is the of the process? Please provide the formula, at least one step of calculation.
(b) Is the process capable based on the value and why?