What happens if the candidate fails? Does the candidate have to do everything over again?

No. For instance if a candidate was to fail 1 specialty written test, the testing company would charge the candidate $65 to retest. It the candidate was to fail any other specialty exams, the testing company would charge $10 for each additional exam, and if the candidate was to fail the core test, the testing company would charge $165. American Crane School does not charge for any candidates who come back for retesting to attend the class or to sit in on the written test. If the candidate was to fail a practical exam, American Crane School charges $250 to retest; this price includes the testing fees to IAI the testing company.