There is no hierarchy.
hierarchy
The plural form of hierarchy is hierarchies.
Hierarchy
Technically is an ordinal level measurement - because the options imply a hierarchy (i.e low to high levels of your variable of interest), but we cannot say that the difference between each level is precisely the same as you would be able to with an interval measurement. There is some controversy over this though, and it is still often used like an interval measurement in statistical tests, although this might not really be appropriate.
Hierarchy is a noun
Acquisition hierarchy and Financial hierarchy
Acquisition/Procurement hierarchy and Financial hierarchy
Its basically a hierarchy just for quadrilaterals.
Acquisition/Procurement hierarchy and Financial hierarchy
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The hierarchy of Roman what? Please restate you question.