Effectiveness trumps efficiency. Identifying what needs to be done comes first (effectiveness) and then we need to find a way to do it efficiently. It’s better to do the right thing less efficiently (effective but inefficient) than to do the wrong thing efficiently (ineffective but efficient).

The truth is that effectiveness is far more important than efficiency. Efficiency is about doing things in an optimal way, for example doing it the fastest or in the least expensive way. We all need to be efficient, but efficiency is at its best when it contributes to effectiveness.

Efficiency and effectiveness are not the same thing. Efficiency is defined as the ability to accomplish something with the least amount of wasted time, money, and effort or competency in performance. Effectiveness is defined as the degree to which something is successful in producing a desired result; success.

Effectiveness is the capability of producing a desired result or the ability to produce desired output. When something is deemed effective, it means it has an intended or expected outcome, or produces a deep, vivid impression.

1. [S] [T] Tom is effective. (
2. [S] [T] It’s very effective. (
3. [S] [T] Tom won’t be very effective. (
4. [S] [T] They won’t be very effective. (
5. [S] [T] Tom is an effective salesman. (
6. [S] [T] Tom is a very effective speaker. (
7. [S] [T] Tom certainly seems to be more effective than Mary. (

From Wikipedia, the free encyclopedia. An effective date or as of date is the date upon which something is considered to take effect, which may be a past, present or future date.

1 to the greatest degree or extent; totally; entirely. 2 amply; sufficiently; adequately.

phrase. If you say that something will happen with immediate effect or with effect from a particular time, you mean that it will begin to apply or be valid immediately or from the stated time. [British, mainly formal] We are now resuming relations with Syria with immediate effect.