There are 7 basic steps to putting on a show:
1. Auditions
2. First Reads
3. Blocking
4. Rehearsals
5. Technical Rehearsals
6. Opening
7. The Run
I use the term the first read to refer to a reading of the play with the other actors after it is first cast.
Here is a list of my posts on the first read:
Surviving the First Read: Part One is here and Part Two is here