The Alcohol Treatment Matrix maps the domain of the treatment of problem-drinking adults (another deals with drug-related problems) onto two intersecting dimensions, and for each sub-domain (a cell) lists the most important UK-relevant research and guidance. Across the columns, the ‘Intervention level’ dimension moves from specific interventions through how their impacts are affected by the widening contexts of practitioners, management, the organisation, and whole area or national treatment systems. Down the rows, the ‘Intervention type’ dimension segments into the major types of interventions implemented at these levels.