Offender Group Reconviction Scale

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The Offender Group Reconviction Scale (OGRS) is a tool, used by the Ministry of Justice in England and Wales, which uses statistical methods to assess the probability of a person reoffending using information about a person's past - specifically any criminal history.

There were a number of predictors of recidivism in use in England and Wales, most often to inform the parole process. A previous iteration of the OGRS was the National Reconviction Assessment Scale (NRAS).

The tool was first developed by the Home Office under Michael Howard's tenure as Home Secretary before being transferred to HM Prison and Probation Service the Ministry of Justice.

OGRS 2 did not use social or clinical factors.

OGRS 3 considers factors such as:

• type of offence
• prior criminal history (including duration in years)
• gender of the individual being assessed

OGRS 4 uses a machine learning algorithm.

The OGRS was first launched in November 1996. OGRS 2 was developed in 1998. OGRS 3 was implemented in 2008.

The OGRS has been criticised because of the high levels of stop and search among ethnic minority groups in the United Kingdom and this specifically being a frequent first point of contact for many young black men and the criminal justice system.

• Gangs Matrix

• "Guide to Proven Reoffending Statistics" (PDF). GOV.UK. 2019. Archived (PDF) from the original on 2024-09-21. Retrieved 2025-03-23.