Section 3. Capability Study (40% of the test) (70% of the test Cumulative) 3. An engine manufacturer uses a forging process to make piston rings. The quality engineers want to assess the process capability. They collect 25 subgroups of five piston rings and measure the diameters. The specification limits for piston ring diameter are 74.0 mm 0.05 mm. Use the Six-Pack output below. Process Capability Sixpack Report for Diameter Xbor Chart Capability toga R Chart Normal Pob Pice ADOPO 16 Last 25 Subgroups Capabiliyor Sargie a Calculate a point estimate of Cp and then, Cpk USL - LSL 60 5 LSL - X USL-X Cpx = Min(Cpt, Cpu) = Min 30 30 b. Is this process centered on target? (Yes or No and why) - Explain c. What can you conclude about the actual process capability