The other options available under the Report Generation Speed are:
Generate reports on due date (students can resubmit until due date): Similarity Reports will not be generated for any submission until the due date and time of the assignment. Students may resubmit as many times as needed until the due date and time without receiving reports. Resubmissions may not be made after the due date and time of the assignment.
Generate reports immediately (students cannot resubmit) - Similarity Reports for all submissions will be generated immediately. Students cannot resubmit papers. Submissions must be deleted by the lecturer/course officer to enable resubmission. This option is not recommended as students are unable to resubmit and submissions are not checked against each other.