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五十年代末和六十年代初,美国陆、海、空三军为了描述军事系统完成其特定任务的总体能力,开始引入系统有效性概念。系统有效性各种定义介绍如下。 美航空无线电公司的定义是,“在特定工作条件下在给定时间内系统能成功地满足工作要求的概率”。为了定义一次使用的装置(如导弹等)的系统有效性,上述定义修改成“系统在
In the late 1950s and early 1960s, the U.S. Army of Armed Forces, Air, Sea and Air Force began to introduce the concept of system effectiveness in order to describe the overall capability of military systems to accomplish their specific tasks. The various definitions of system effectiveness are described below. American Aeronautic Radio is defined as “the probability that a system will successfully satisfy a job’s requirements at a given time of day under certain operating conditions.” In order to define the system effectiveness of a single-use device (such as a missile, etc.), the above definition is modified to "