השוואת שיטות

	Situational Crime Prevention Analysis	Crime Displacement and Diffusion Analysis
תחום	Criminology	Criminology
משפחה	Process / pipeline	Process / pipeline
שנת המקור	1997	2003
הוגה השיטה	Ronald V. Clarke	Kate Bowers & Shane Johnson
סוג	Opportunity-reduction framework for crime prevention	Quasi-experimental spatial impact assessment of crime prevention
מקור מכונן	Clarke, R. V. (Ed.). (1997). Situational Crime Prevention: Successful Case Studies (2nd ed.). Harrow and Heston. ISBN: 9780911577389	Bowers, K. J., & Johnson, S. D. (2003). Measuring the geographical displacement and diffusion of benefit effects of crime prevention activity. Journal of Quantitative Criminology, 19(3), 275–301.
כינויים	SCP, Situational Prevention, Opportunity-Reduction Framework, Twenty-Five Techniques of Situational Crime Prevention	Crime Displacement Analysis, Diffusion of Benefits Analysis, Weighted Displacement Quotient, WDQ Analysis
קשורות	4	4
תקציר	Situational crime prevention (SCP) is a framework, developed by Ronald Clarke, for reducing crime by changing the immediate situations in which it occurs rather than the dispositions of offenders. It diagnoses the specific opportunities that make a crime easy, rewarding, or low-risk and then applies twenty-five practical techniques organized under five mechanisms: increase effort, increase risk, reduce rewards, reduce provocations, and remove excuses.	Displacement and diffusion analysis evaluates what happens around a crime-prevention intervention: does crime simply move to nearby areas, times, or targets (displacement), or do the benefits spill over so that crime also falls in surrounding untreated areas (diffusion of benefits)? Bowers and Johnson's weighted displacement quotient (WDQ) provides a simple, widely used metric that compares pre/post crime change in a target area, a surrounding buffer, and a control area.