Effectiveness is the extent to which an organisation or programme accomplishes its mission, goals, and objectives, especially from the perspective of key stakeholders. It is part of the three ‘E’s (Economy, Efficiency and Effectiveness). If Economy means ‘spending less’ (reduce input), and Efficiency ‘spending well’ (more output for a given amount of input), Effectiveness is ‘spending wisely’, that is use input in such a way as to maximise the likelihood of achieving a maximum outcome.