The guidelines promulgate the circumstances of the offense and the offender's characteristics as a basis for the sentence. Because these circumstances and characteristics are known at the time that an offender arrives at a correctional institution, the presumptive release date can be determined shortly thereafter and promptly communicated to the prisoner. This system has many advantages sought by determinate sentencing advocates. For example, the offender has less to gain through hypocritical efforts to curry favor with the parole board, and the psychological torture is reduced when the release date is known in advance. The guidelines also mark dramatic progress toward solving the problem of judicial sentencing disparity. The U.S. Parole Commission, a relatively small national agency, is expected to apply its guidelines in a uniform fashion, but the courts should determine the length of incarceration under the guidelines system because they can better assess the relevant facts. However, courts will be ready to apply the guidelines only after plea bargaining is restricted. This practice raises general problems of factual adjudication in sentencing. Another problem raised by the guidelines is that of grading the severity of offenses. For example, in the area of property offenses, legislative classifications of crime often are too detailed to be helpful for sentencing purposes, while for offenses against the person, legislation is usually too general. Detailed offense-by-offense and situation-by-situation studies are needed. Finally, an important advantage of the new guidelines is that they brought the problems of grading the severity of offenses and of factual adjudication in sentencing into the open. A total of 21 reference notes are included.