The case shall be called to order by the hearing examiner. The hearing examiner may explain briefly the purpose and nature of the hearing and may allow counsel or any interested party to be heard for any prehearing objections, exceptions, or motions. Any prehearing motion shall be heard and decided by the hearing examiner. The party bearing the burden of going forward shall be the first to offer its case in chief. The hearing examiner may alter the order of presentation of evidence and witnesses. The parties may make opening and closing statements.