It is based on solubility 200-500% increase for poorly soluble and 1000-1500% increase for highly soluble.
The limitation is getting the active ingredient into solution so something that is 30,000mg (30g) you would likely need 400ml of SEDDS
Have a read here if you are actually interested:
http://www.researchgate.net/profile...plications/links/0912f509686d675c73000000.pdf
Click on the right hand side view FULL TEXT.
If you are not wanting to read the whole thing page 67 contains percentage increases for different substances in several animal, human trials.