1. Scheduling:由人工预约时间存在不准 确性,浪费时间。(因当时的机器昂贵) 2. Setup time ①运行前的准备: included loading the compiler, source program, saving compiled program (object program) and loading and linking together the object program and common function ②出错从头来。1. Scheduling:由人工预约时间存在不准 确性，浪费时间。（因当时的机器昂贵） 2.Setup time: ①运行前的准备：included loading the compiler、 source program, saving compiled program（object program）, and loading and linking together the object program and common function。 ②出错从头来