Effectiveness is the capability of producing a desired result. When something is deemed effective, it means it has an intended or expected outcome, or produces a deep, vivid impression.
Etymology
The origin of the word "effective" stems from the Latin word effectīvus, which means creative, productive or effective. It surfaced in Middle English between 1300-1400 A.D.
Usage
In
mathematicsMathematics is the study of quantity, space, structure, and change. Mathematicians seek out patterns and formulate new conjectures. Mathematicians resolve the truth or falsity of conjectures by mathematical proofs, which are arguments sufficient to convince other mathematicians of their validity...
,
effective is sometimes used as a synonym of
algorithmically computableComputable functions are the basic objects of study in computability theory. Computable functions are the formalized analogue of the intuitive notion of algorithm. They are used to discuss computability without referring to any concrete model of computation such as Turing machines or register...
.
In
physicsPhysics is a natural science that involves the study of matter and its motion through spacetime, along with related concepts such as energy and force. More broadly, it is the general analysis of nature, conducted in order to understand how the universe behaves.Physics is one of the oldest academic...
, an effective theory is, similar to a
phenomenologicalThe term phenomenology in science is used to describe a body of knowledge that relates empirical observations of phenomena to each other, in a way that is consistent with fundamental theory, but is not directly derived from theory. For example, we find the following definition in the Concise...
theory, a framework intended to explain certain (observed) effects without the claim that the theory correctly models the underlying (unobserved) processes.
In
heat transferHeat transfer is a discipline of thermal engineering that concerns the exchange of thermal energy from one physical system to another. Heat transfer is classified into various mechanisms, such as heat conduction, convection, thermal radiation, and phase-change transfer...
,
effectiveness is a measure of the performance of a
heat exchangerA heat exchanger is a piece of equipment built for efficient heat transfer from one medium to another. The media may be separated by a solid wall, so that they never mix, or they may be in direct contact...
when using the
NTU methodThe Number of Transfer Units Method is used to calculate the rate of heat transfer in heat exchangers when there is insufficient information to calculate the Log-Mean Temperature Difference...
.
In
medicineMedicine is the science and art of healing. It encompasses a variety of health care practices evolved to maintain and restore health by the prevention and treatment of illness....
, effectiveness relates to how well a treatment works in practice, as opposed to
efficacyEfficacy is the capacity to produce an effect. It has different specific meanings in different fields. In medicine, it is the ability of an intervention or drug to reproduce a desired effect in expert hands and under ideal circumstances.- Healthcare :...
, which measures how well it works in
clinical trialClinical trials are a set of procedures in medical research and drug development that are conducted to allow safety and efficacy data to be collected for health interventions...
s or laboratory studies.
In
managementManagement in all business and organizational activities is the act of getting people together to accomplish desired goals and objectives using available resources efficiently and effectively...
, effectiveness relates to
getting the right things done.
Peter DruckerPeter Ferdinand Drucker was an influential writer, management consultant, and self-described “social ecologist.”-Introduction:...
reminds us that effectiveness
can and
must be learned.”.
In
human–computer interactionHuman–computer Interaction is the study, planning, and design of the interaction between people and computers. It is often regarded as the intersection of computer science, behavioral sciences, design and several other fields of study...
, effectiveness is defined as “the accuracy and completeness of users’ tasks while using a system”.
Related terms
Efficacy, efficiency, and effectivity are terms that can, in some cases, be interchangeable with the term effective. The word
effective is sometimes used in a quantitative way, "being very or not much effective". However, neither effectiveness, nor effectively, inform on the direction (positive or negative) and the comparison to a standard of the given effect.
EfficacyEfficacy is the capacity to produce an effect. It has different specific meanings in different fields. In medicine, it is the ability of an intervention or drug to reproduce a desired effect in expert hands and under ideal circumstances.- Healthcare :...
, on the other hand, is the ability to produce a desired amount of the desired effect, or success in achieving a given goal. Contrary to the term
efficiencyEfficiency in general describes the extent to which time or effort is well used for the intended task or purpose. It is often used with the specific purpose of relaying the capability of a specific application of effort to produce a specific outcome effectively with a minimum amount or quantity of...
the focus of efficacy is the achievement as such, not the resources spent in achieving the desired effect. Therefore, what is
effective is not necessarily
efficacious, and what is
efficacious is not necessarily
efficient.
Other synonyms for effectiveness include: clout, capability, success, weight, performance.
Antynoms for effectiveness include: uselessness, ineffectiveness, unproductivity.
Another source of confusion regarding the term effectiveness is its relationship with the term affectiveness. Due to the similarity in the way these two words are spelled, they are often confused with each other and used incorrectly. The term affectiveness (noun) is derived from the root word affective (adjective) meaning concerned with arousing emotions or affection or relating to moods, attitudes or feelings.