1·The method integrates the need (reliability of system) with probability (proportional quotiety) and presents a new approach to get the subsystem reliability index of equipment.
该方法将需要（系统的可靠性指标）和可能（比例系数）结合起来，为装备可靠性指标的确定提供了一种新的方法。
2·Pile foundation is used widely, but the calculation is troubled. Traditional calculation only considered single soil layer, it has to adopt equated foundation quotiety for multi soil layer foundation.
桩基础应用广泛 ，但计算麻烦 ，传统的计算方法只能考虑单一的土层 ，对于多层土的地基要采用换算的地基系数。
3·Due to the lack of detailed information of the system in the concept phase of development, an index eclectic quotiety method is introduced to resolve the problem.
针对系统研究初期缺乏详细信息和有效方法，采用了指标折衷系数法来解决该问题。