The HEAT target “Deliver faster access to mental health services by delivering 18 weeks referral to treatment for psychological therapies from December 2014” was approved by the Scottish Government in November 2010 and is currently being implemented in Health Boards. The objective is to deliver on-time8 evidence-based psychological therapies to efficiently and effectively treat mental disorders. For instance, the Psychological Therapies “Matrix” has been developed as a guide to help Health Boards to deliver efficient and effective psychological therapies. In order to achieve this objective, the Matrix summarises the most up-to-date advice on evidence-based interventions, provides the necessary training for delivering safe and effective therapies, and identifies the key gaps in mental health services. The Driver Diagram has been developed to support the implementation of the target across the Health Board activities. It is a method conceived to identify the parts of the mental health delivery system that need to be improved, and then to make recommendations for specific changes.