Originally Posted by captjns
Very simple and no rocket sceintry required. Descend at a lesser rate than required that of a normal 3 degree path until G/S intercept. Minimum thrust is better than trust required to maintain level altitude.
A CDA is designed to'minimise' noise not merely reduce it. The idea is thrust idle from TOD and on (or above) a 3 degree G/S until stable @ e.g 1000' aal on finals.
If you are using a low v/s to stay below the G/S and merely avoiding a 'level segment' (how ATC assess a CDA) this will look good on the statistics but is not what is intended by a CDA.