The Story Diamond is a useful diagram in structuring a story or screenplay. It was conceived by Chris Vogler and Will Smith, and then used by screenwriters Marianne & Cormac Wibberley for an upcoming Will Smith project that I was called in on to brainstorm. What they handed out in the story meeting is the left hand side of the image, without the various labels, and obviously without their story notes. With their permission I took it and enhanced it by overlaying the various story structures used in the industry. The latest version is linked on the moral premise website in the middle of THIS PAGE... scroll down to find it.
Here's what it looks like today with a host of other story structure systems overlaid. A full explanation of the Story Diamond is presented in my On-Line Storycraft Training series.