An automated tube bending operation produces parts with an included angle = 91.2(. The process is in statistical control and the values of included angle are normally distributed with a standard deviation = 0.55(. The design specification on the angle = 90.0( ( 2.0(.
(a) Determine the process capability.
(b) If the process could be adjusted so that its mean = 90.0(, determine the value of the process capability index.