Summary: Social workers and probation officers are frequently called upon to make judgements about the likelihood of re-offending. However, whilst the use of risk assessment instruments is now commonplace, the cognitive processes through which. The Offender Assessment System (OASys) as a basis for all the sentence planning. Where there is a need for additional assessments because of the serious nature of the offending, then additional reports will be prepared by specialists. These will supplement the baseline OASys assessment. Assessments – Pre-Sentence Reports. The Offender Assessment System: User manual. It is likely that you will all have access to an electronic version of this document. Add to My Bookmarks Export citation. Type Document Author(s) Home Office. OASYS Manual – Revised Chapter on Risk of Se. Have you read this? The Offender Assessment System (OASys) is the risk assessment and management system routinely used in the National Offender Management Service (NOMS), the prison and probation service for England.
OASys is the abbreviated term for the Offender Assessment System, used in England and Wales by Her Majesty's Prison Service and the National Probation Service from 2002 to measure the risks and needs of criminal offenders under their supervision.
OASys is designed to enable a properly trained and qualified individual; often a Probation Officer, to:
. The OASys assessment must be completed following an interview with the offender, using both collateral and file information. O The collateral information provides primary information and helps evaluate the credibility of the information gained during the interview. O The interview provides information not available from other sources. Fit for purpose? OASys assessments and parole decisions. OASys User Manual, V olume 2. London: National Probation. (US), the Offender Assessment System.

- assess how likely an offender is to be re-convicted
- identify and classify offending-related needs, including basic personality characteristics and cognitive behavioural problems
- assess risk of serious harm, risks to the individual and other risks
- assist with management of risk of harm
- links the assessment to the supervision or sentence plan
- indicate the need for further specialist assessments
- measure change during the period of supervision / sentence.
OASys comprises a series of computer-based forms on which clinical evaluations are made by staff of Offenders, and supervision and sentence plans for the forthcoming period of supervision are recorded on a periodic basis - typically every 16 weeks for offenders in the community, and less frequently for imprisoned offenders.
Oasys Teacher Evaluation
OASys supports the What Works? initiative of the Prison and Probation Services, by providing metrics by which the characteristics of offenders and their offences (inputs) can be analysed alongside information on interventions made (inputs) to the offender, and re-conviction data for offenders (outcomes), in order to enable refinement to be made to interventions (based on a consideration of the relation between inputs and outcomes) as to improve outcomes - in other words, to decrease recidivism rates by ensuring that interventions are as appropriate and purposeful as possible.
External links[edit]
Oasys Account
- OASys: the new Offender Assessment System - National Probation Service, Spring 2003
- Findings from the measurement of OASys completion rates - Ministry of Justice, March 2009