Contents Chapter 1: Introduction to OASys What Works 1 An effective risk needs assessment 3 What is OASys? 3 Benefits of OASys 3 Chapter 2: The development of OASys Clinical versus actuarial risk assessment 5 Social/dynamic factors 7 User surveys 9 Components of OASys 10 Risk of reconviction and offending-related factors 12 Overview of OASys 13 OASys 1 and OASys 2 14 Analysis of the risk of serious harm, risks to the individual, and other risks 18 Supervision and sentence planning 20 Chapter 3:
Gathering information, handling discrepancies and managing information that may not be disclosed to the offender Gathering information 21 Handling discrepancies 21 Factors to take into account when completing OASys 22 Managing information that may not be disclosed to the offender 22 Chapter 4: Self-assessment The purpose of self-assessment 25 When should the self assessment be completed? 25 How to complete the self-assessment 25 Basic skills 25 Is the self-assessment scored? 26 Chapter 5:
Case identification 27 Considering further offences 29 Case identification sheet 29 Offending information, section 1 30 Analysis of offences, section 2 31 Rescoring sections 3-12 31 Risk of harm and supervision and sentence planning 32 Changes to sentence(s) and offence(s) resulting from appeal 32 OASys Manual V2 © Crown Copyright 2002