Johannes Knutsson Norwegian Police University College and Ronald

Crime prevention has made rapid progress during the past two decades. This is especially true of situational crime prevention and problem-oriented policing. Each has accumulated a substantial body of evaluated practice and an extensive theoretical and methodological literature to support that practice. In fact, in recent years, the literatures of these two fields have converged, and there has also been some blurring of practice so that, for example, problem-oriented policing projects now make increasing use of techniques and concepts drawn from situational prevention. This is not surprising because, despite their different origins one in police organizational theory and the other in criminology the two approaches share some important assumptions about the best way to prevent crime, including the need to focus on immediate causes of highly specific forms of crime and the desirability of adopting an "action-research" methodology (Tilley, 1999). Unfortunately, both crime prevention approaches also share a weakness the focus of the present volume which is that they have neglected implementation, i.e., the stage when measures identified during analysis are put into practice.