"A script is obviously less than a play, while a production is more." -Ronald Hayman

A play is a written work that is meant to be on a stage or broadcast somehow. A script is the written work of the play.  A play would have a script to practice before the performance. However, a script can exist as a piece of literature without being performed. A production is much bigger than a script and even bigger than a play. A production involves many people, costumes, props, lighting, and set design.  A play can be a simple show or it can be much more involved and closer to a production.  Both a play and a production need a script as the foundation which is why the script is less than both.