How do the programme's impacts compare with the needs of the target population? This issue is closely related to sustainability. See also impacts, intervention logic, needs, outcomes, results, sustainability, target population.

A numerical measurement of a decision maker's relative preference for possible consequences.

the relative desirability or preference (usually from the perspective of a patient) for a specific health outcome or level of health status.

A number that represents the value of a specific outcome to a decision maker. (See, for example, quality-adjusted life-year.)

A quantitative measure assigned to an outcome, expressing the preference for that outcome compared to others. See also: Decision tree.