After the hearings are complete, a transcript of the case is prepared, and briefs from other parties are filed. The Commissioners review the filings in making their decision.
Through this regulatory process, the Commissioners have a duty to approve cases that allow the utility a reasonable opportunity to earn an allowed rate of return - enough money to meet reasonable expenses, pay interest on debts and provide a reasonable return to stockholders.
When a decision is made, the Commission announces it through a written report and order. That order is subject to appeal by all of the participants in the case, except the MPSC Staff.