. . Starting Step 4.7 - SD control chart for cassette . y1label sd of line width x1label wafer line solid all character x BLANK BLANK BLANK BLANK BLANK BLANK xlimits 0 30 xtic offset 1 2 s control chart width cassette let a1 = maximum xplot subset tagplot = 2 let a1 = a1 + 4 let a2 = maximum yplot subset tagplot = 2 let a3 = maximum yplot subset tagplot = 3 let a4 = maximum yplot subset tagplot = 4 movedata a1 a2 text Target movedata a1 a3 text UCL movedata a1 a4 text LCL line solid all character blank all xlimits xtic offset . Finished Step 4.7: Page Back for Output