The state of having produced a decided on or desired effect.

Effectiveness means the extent to which the activity's stated objectives have been met.

c. 1600, from effective + -ness.

A measure of the quality of attainment in meeting objectives; to be distinguished from efficiency, which is measured by the volume of output achieved for the input used. [D00589]

The extent to which the project plan, including requirements, and the execution of that plan will meet the project's objectives and the corresponding goals of the enterprise. [D02697]

How beneficial a test or treatment is under usual or everyday conditions, compared with doing nothing or opting for another type of care.

the degree to which an interface facilitates a user in accomplishing the task for which it was intended. This normally refers to the degree to which errors are avoided and tasks are successful, measur [..]

power to be effective; the quality of being able to bring about an effect potency: capacity to produce strong physiological or chemical effects; "the toxin's potency&q [..]

The extent to which actual outcomes are achieved, in terms of the planned outcomes, via relevant outputs or administered expenses. An intervention's effectiveness should be distinguished from its [..]

A property of a Target of Evaluation representing how well it provides security in the context of its actual or proposed operational use [ITSEC].

The extent to which an intervention produces favorable outcomes under usual or everyday conditions

bioavailability

The capacity to realise organisational or individual objectives. Effectiveness requires competence; sensitivity and responsiveness to specific, concrete, human concerns; and the ability to articulate these concerns, formulate goals to address them and develop and implement strategies to realise these goals.

The combination of process safety management performance and process safety management efficiency. An effective process safety management program produces the required work products of sufficient qual [..]

An effective graph presents all information clearly in view of visualization aims. [MAC86]

Evaluation of the gained results with respect to the success of reaching the objective of a project and assessment of how the assumptions affected the outcome of the project.

Degree to which the program yields desired/desirable results.

A measure of the benefit resulting from an intervention for a given health problem under usual conditions of clinical care for a particular group.

(n) power to be effective; the quality of being able to bring about an effect(n) capacity to produce strong physiological or chemical effects

A general system performance measure defined as the degree to which stated goals and objectives are achieved (see also efficiency).

How well an ad achieves a marketing objective such as increasing sales of a product in a store or lifting the brand perception of a company. Viewable impressions are not measures of effectiveness but [..]

The ratio of Radiation Dosages required to produce identical change based on a formula comparing other types of Radiation with that of gamma or Roentgen Rays.

Adequacy to accomplish a purpose; producing the intended or expected result. For CAEP purposes effectiveness includes the impact that a candidate or program completer has on P-12 student learning.

See Vaccine effectiveness. Efficacy

extent to which planned activities are realized and planned results achieved

Carrying out justice system activities with proper regard for equity, proportionality, constitutional protections afforded defendants and convicted offenders, and public safety.       

The damage dealt in an attack is adjusted according to the type of the move used by the attacking Pokémon and the type of the targeted Pokémon. Attacks can be normally effective, super effective, not [..]

Relates to providing care processes and achieving outcomes as supported by scientific evidence.

A measure of the benefit resulting from an intervention for a given health problem under usual conditions of clinical care for a particular group; this form of evaluation considers both the efficacy o [..]

The ability of an intervention to achieve the desired results under usual conditions.

A determination that a therapeutic intervention is feasible and has measurable beneficial effects applicable to a broad population of clients/patients in real-world settings. Effectiveness studies typically do not have the degree of research design control present in efficacy studies; however, they tend to emphasize external validity and the genera [..]

A measure of the benefit resulting from an intervention administered under usual conditions of clinical care for a particular group of patients. See Intention to treat

Refers to the worth of a project in achieving formative or summative objectives. "Success" is its rough equivalent.

When used in the research setting, clinical effectiveness reflects how a particular treatment performs in an actual practice environment. It differs from clinical efficacy because, for example, patients receiving a product in a typical medical practice may have comorbidities that might alter the ability of a medication to achieve its intended effec [..]

The property of being effective, of achieving results. ''The effectiveness of the drug was well established.'' The capacity or potential for achieving results. * title=What Happened to the Rule [..]