I created an orthogonal design in R using AlgDesign package. I got 14 profiles and some output: D =0.2519353; A = 5.462121; Ge = 0.748; Dea = 0.714.
How to interpret D , A , Ge and Dea? Also, In regression like we have r square, which value should we be looking for D-Efficiency and how much it should be in order for this design to be usable in a choice based conjoint/Discrete choice model experiment as alternatives? Any ideas?