For Exercises 12.11 to 12.13, see page 612; for 12.14 and 12.15, see page 614; for 12.16 to 12.18, see page 619; and for 12.19 to 12.21, see pages 625–626.
12.21 O-ring capability in terms of percent defective.
oring
CASE 12.2 Refer to Example 12.9 for the mean and standard deviation estimates for the O-ring application. Using software, estimate the percent of O-rings that do not meet specs. In quality applications, it is common to report defective rates in units of parts per million (ppm). What is the defective rate for the O-ring process in ppm?
12.21
0.000185438, or 185 ppm.