The model levels listed in the rows address increasing levels of specificity and detail as system development progresses. 在行中所列出的模型级别提出了增长的特性级别,并按照系统开发进展详细说明。
Model levels are a way of grouping artifacts with a similar level of detail. 模型级别是一种用类似的细节级别分组工件的方法。
We have also learned that a particular viewpoint may not be useful at all model levels. 我们还了解到特殊的视点也许不是在所有模型级别上都有用。
Discoveries made in one view may very well radiate out to affect artifacts within other views on the same model level; they may also flow both up and down model levels within the same viewpoint. 在一个视图中所进行的发现可能会很好地辐射开来,影响到同一模型级别的其它视图中的工件;它们也可能在相同的视点上流上和流下模型级别。
However, if the system involves actual hardware development, then we certainly do need a hardware viewpoint at the more specific ( lower ) model levels. 然而,如果系统涉及实际的硬件开发,那么,我们在更具体(低级)的模型级别上就的确需要硬件视点。