A manufacturer of commercial and residential lawn mowers has collected data from testing its products. These data are available in the Excel file Quality Control Case Data. The worksheet Blade Weight provides sample data from the manufacturing process of mower blades; Mower Test gives samples of functional performance test results; and Process Capability contains additional sample data of mower blade weights. Use appropriate control charts and statistical analyses to provide a formal report to the manufacturing manager about quality issues he should understand or be concerned with.