The process quality index is obtained by multiplying these five values together
Figure 8.11 shows the PQI profiles for six programs. The two programs
with the poorest-quality profiles (numbers 5 and 6) were the only ones with defects
after unit testing. The data in Figure 8.12 show that programs with PQl values
above 0.4 historically have had no defects found after unit testing. The PQI goal, however, should be 1.0.