This manual, written by two leading crime prevention experts, is intended for crime analysts and other police officials working on problem oriented policing projects. It covers the basics of problem-oriented policing and shows how many new concepts developed to analyze crime patterns can sharpen understanding of crime and disorder problems. It also shows how the 25 techniques of situational crime prevention can greatly expand the problem-solving capacity of police. Finally, it gives guidance on ways to assess the effectiveness of action taken, including ways of testing for displacement.