Under LRH, once course is complete, it's time for the student to really put in the time and effort necessary to perfect his auditing skills:

“When [the Intern] has turned out pcs, pcs, pcs, pcs, 5, 6, 8, 10 hours a day for weeks and weeks and is a total success as a Dianetic Auditor, he can go on up.

“… Now it begins all over again. Flubs — Cramming, midnight oil, audit audit cramming audit audit new word clear new drill work audit audit audit audit 5, 6, 8, 10 hours a day. Now he is a IV or VI Auditor.”

HCOB 19 July 1971
C/S Series 52, Interns
(Subject Vol. 1, p. 194)