William Shakespeare's play, Macbeth, was intended to be performed, rather than read. There are many factors that need to be considered when casting, performing and staging a production of the play.
Once the play has been cast and rehearsals begin, the director and the actors will develop further thoughts about characters and how they should be presented. The text of the play and Shakespeare's language will provide the biggest indication of how to make these choices. Typically actors will look closely at the text to see:
what the character says about her/himself
what the character says about other characters
what other characters say about her/him
This evidence from the text will help actors to make initial choices about the way their character will develop.
There will be discussions about a character's motivationThe intention behind a character's action/speech. The motivation drives the action/speech in a scene and may reveal truth or hidden meaning (subtext). which will provide thoughts about aims and ambitions (this is particularly important in Macbeth) and why a character behaves in the way that they do. Reaction to other characters and interaction between them is obviously important and this will be explored in rehearsals, workshops, discussions and further investigation of the text. The director will also consider themes in the play and may wish to emphasise some and pay less attention to others. This will further affect decisions about performance and the particular way that the production will interpret the play.
At this time, the director may also begin to think about what other elements (lighting, sound, costumes, etc) are added to the scene as it is performed.