Under 28 U.S.C. § 994(a)(3), the Sentencing Commission is required to issue guidelines or policy statements applicable to the revocation of probation and supervised release. At this time, the Commission has chosen to promulgate policy statements only. These policy statements will provide guidance while allowing for the identification of any substantive or procedural issues that require further review. The Commission views these policy statements as evolutionary and will review relevant data and materials concerning revocation determinations under these policy statements. Revocation guidelines will be issued after federal judges, probation officers, practitioners, and others have the opportunity to evaluate and comment on these policy statements.