Check the lighting utilized in each scene of the play. This includes positioning the instruments, verifying the colors and lighting intensity used in each scene, and verifying the lighting cues in the lighting operator's script, which will be followed during each performance.
Check the sound cues. Set the volume and placement of each cue that will be used during the play. Verify the cues are properly placed in the script the sound operator will follow during each performance.
Run through each set change with those who will perform them. Be sure the changes can be performed quickly and smoothly during performance.
Verify the costumes fit correctly and look right under performance lighting. Perform any quick changes that will be done during performance and verify they can be done in the time allowed.