关于重要性（W）和利用率（U）术语量化的报告扩展了系统有效性（Es=ADC）基本表达式的范围，包括多功能和多任务系统量化所需的额外“W”和“U”参数。讨论了将这些术语应用于系统效能量化的方法和程序，并包括了演示使用原则的简单示例。说明了需要根据任务/功能层次结构树中的级别对系统进行量化。 讨论并举例说明了系统要素（硬件、软件和人员）与性能功能之间的关系。描述了应用“W”和“U”权重因子的两种方法，即逻辑and（薄弱环节模型）和逻辑OR（降级运行模式模型），并给出了这些情况的示例。

This report on quantification of Essentiality (W) and Utilization (U) terms extends the scope of the basic expression for system effectiveness (Es = ADC) to include the additional "W" and "U" paramenters needed for the quantification of multi-functioned and multi-missioned systems. Methods and procedures for applying these terms to system effectiveness quantification are discussed and simple examples to demonstrate the principles of usage are included. The need to look at the system being quantified in terms of its level in the mission/function hierarchical tree is explained. The relationships between system elements (hardware, software, and personnel) and performance functions are discussed and illustrated with examples. Two methods for applying the "W"'and "U" weight factors, LOGIC AND (weak link model) and LOGIC OR (degraded operational modes model) are described and examples are shown for these cases.