The Commission shall adopt sentencing guidelines that the Commission may change. The sentencing guidelines shall include sentencing guidelines for ordinary sentences and sentencing guidelines for corrections options. The sentencing guidelines for ordinary sentences shall call for sentences within the limits set by law and shall set forth: the range of sentences for crimes of a given degree of seriousness; a range of increased severity for defendants previously convicted of or adjudicated delinquent for a previous crime; and a list of aggravating and mitigating circumstances. The sentencing guidelines for corrections options shall be designed to identify defendants qualified for corrections options programs.