How efficiency differs from effectiveness?which one of them can be measured in quantitative terms?Quality?

Answer 1

EFFICIENCY means: saving TIME, MONEY or EFFORT

EFFECTIVENESS means how well the the job gets done. i.e. the quality of the output.

EFFICIENCY and EFFECTIVENESS do not mean the same thing! In fact, they are often natural enemies. Often you can have one, or the other, but not both (unless you are lucky or you want to spend a lot of money.)

Being efficient means you spend less time on something, you spend less money on something or you spend less effort (or number of workers) on something. You will not often get all three types of efficiency. Which one you aim for depends on what you are trying to achieve.

Being effective means you do your job well. In other words, the output (finished product) is of high quality.

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Answer 2

Well more than answering this interesting question, I am just thinking aloud with you here.

Efficiency relates to measuring the extent of result comparing it with the resources/effort which have gone into acheiving it. Obviously measurable when the output and input can be quantized.

while ..

Effectiveness is more of a qualitative indicator and is essentially the intensity of the response for a particular action including even just a catalytic role.