Why Magic Number is 7 plus/minus 2 ?

Because human (short-term) memory sustained till number 7 plus/minus 2, we manage 'works' well till number 7. 

Thus, we need to 'control' out work number as seven plus/minus 2. 

The Magical Number Seven, Plus or Minus Two: Some Limits on Our Capacity for Processing Information

by George A. Miller

originally published in The Psychological Review, 1956, vol. 63, pp. 81-97
(reproduced here, with the author's permission, by Stephen Malinowski)

Posted by Jeonghwan Choi

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