Exam performances are marked based on 5 minutes per performer. The easiest way to ensure that everyone is seen is to keep all students on stage at all times (unless a deliberate decision is made for some reason for someone to exit/ appear for dramatic effect.) Don't have blackouts throughout the piece with music in scene changes as this adds to the length of the piece. The examiner will stop marking at the allocated time, so if a group of 5 students have done a piece that is 35 minutes when it should have been 25-30 minutes, the examiner won't have marked the last 5 minutes. If a student has their monologue/ big moment in that 5 minutes, they won't have been marked for this and this will affect their result.