Successful implementation of intensive intervention using data-based individualization (DBI) is more likely to occur in schools that have a well-functioning tiered system of support, commonly called a multi-tiered system of supports (MTSS), response to intervention (RTI), or positive behavioral interventions and supports (PBIS), depending on your location and area of focus. Intensive intervention is considered the most intense level of intervention and also may be known as Tier 3.