任何系统结构都靠整体功能发挥作用,只要有一个因素受限制,其他的因素也难以发挥应有的作用,这叫限制因素定律。人们把这一定律喻为:一只木桶的容量,不取决于构成木桶的那块最长的木板,而取决于最短的那块木板,于是,人们又把这一定律叫做“木桶理论”。所谓系统,是指由若干相互联系、相互作用的要素按一定规则构成的具有特定功能和运动规律的有机整体(集合)。 Any system structure relies on the overall function to play a role, as long as there is a restriction of factors, other factors are difficult to play its due role, called the law of limitations. The law is said to be: the capacity of a barrel does not depend on the longest wooden plank that forms the barrel, but on the shortest plank, so the law is called “barrel theory”. The so-called system, refers to a number of interrelated, interacting elements according to certain rules constitute a specific function and movement of the organic whole (collection).