Normally, theatre criticism happens after the creative process of the playwright, director and designers is complete. Barring that of the actors, the creative process is finished, and the critic evaluates the finished product. There has been a visible emergence of embedded criticism in recent years, where theatre makers invite critics into the rehearsal and development process to document their work, interview the creative team, critique, and provide background information to readers and audiences. This serves as advocacy for the work and provides the company with valuable feedback at the point where they can make changes. Embedded critics publish this work, and can be present as much or as little as the company likes. Matt Trueman discusses embedded criticism in more detail here.
I am available for work as an embedded critic, and also as a script consultant. As a script consultant, I don’t come to the rehearsal room. Instead, I read your script and either write a report that gives feedback and suggestions for improvements, or annotate the copy you send me. This is more appropriate for a play in its earlier stages, well before it reaches pre-production.
To enquire about either the embedded criticism or script consultancy process and rates, email me at shakespearean [at] gmail [dot] com.