Roughing-in should include

selecting from water closet, lavatory, bathtub, shower, kitchen or bar sink, washing machine
following code, manufacturer's specifications, and industry standards
installing a water closet flange.

IRC: Chapters 26 and 30 cover sanitary drainage, Chapter 31 covers venting of waste pipes, and Chapter 32 covers traps. This includes installation, pipe connections, securing pipe, and falling pipe.

Process/Skill Questions:

What is meant by rough-in?
What is another name for a water closet?
Where does all drainage water flow?
What materials are used in closet flanges?
What holds the water closet to the flange?
What types of materials are used in closet bolts?