Knowing that this is needed prior to the build can make planning the framing and tile prep easier. I discuss the various options for waterproofing barrier free showers on my blog site @ http://www.no-curb.com.
Shown in this picture is a Schulter System Kerdi Drain and this works with many tile choses, but not all. Remember that if you use this drain and their membrane you can only use a non-modified setting material. These are less than ideal in wet environments like shower floors - a better approach is to use setting materials from Ardex fore this type of install or switch out the drain to one of the many options available that offer up the use of any setting material.
Understanding what a modified setting material is, what a un-modifed setting material is, what a S2 thin set is and on and on is a very key bit of knowledge every designer or architect should know. Joining an organization like the NTCA or TTMAC will go a long way in educating you and your team on proper shower construction.