One way to proceed with the evaluation of the implemented interventions is with before and after comparisons, through statistical tests that determine intended and unintended outcomes and systematic follow-up of interventions and the outcomes, in order to assess any offender adaptation to the environment manipulation (Clarke 2005:55). However, this matter is complex in the way that replication is impractical as each intervention is tailored to a specific location and its criminogenic context.
Besides, the success of certain measures might be dependent on other interventions that occur simultaneously, mainly the collaboration with other team departments and targets, crucial to tackle the offender motivation, which situational crime prevention hardly can reduce (Clarke 2005:55).
Nonetheless, the interventions are applied to a society that already has concepts and norms established. Therefore, situational interventions may face some barriers, as represented in the following figure (Clarke 2005:40-59, Clarke 1980:141, Hamilton-Smith and Kent 2005:428-429)
Starley Cross Community Safety Team 