In September 2005 a new system of short-notice inspections came into being. Under this system the senior leadership of each school were strongly encouraged to complete a Self Evaluation Form (SEF) on a continual basis, which required them to be aware of strengths and areas for development. Inspections were generally two- or three-day visits every three years, with two days' notice. They focussed on the "central nervous system" of the school – examining how well the school was managed, and what processes were in place to ensure standards of teaching and learning improve; the school leadership and management were expected to be aware of everything in the SEF. The SEF served as the main document when planning the inspection, and was crucial in evaluating the quality of leadership and management and the school's capacity to improve.