This chapter focuses on the functions that are required for effective problem solving and goal/task management. It draws on the models; the processes included are those necessary for planning, for initiating actions, and for monitoring actions against an intended goal. A hierarchical cluster analysis was also used to examine which tests were used to examine which executive functions, which reduced the 50 different terms to a set of 18 constructs. Even if an assessment has identified evidence of executive impairment it is important to consider whether other cognitive or emotional difficulties are impacting on a person's functioning and may be affecting their ability to achieve the rehabilitation goals. In situations where a person has some awareness of difficulties it is important to consider whether the level of impairment is such that they may be able to engage in learning meta-cognitive strategies and whether they are likely to implement them in everyday situations.