The rigid hierarchy in the ministry made reform slow and contentious.

In modern companies, overlapping hierarchies often slow down decision-making more than technical limitations.

The company's hierarchial structure made decision-making slow and rigid.

To determine the descriptive power of different fragments, researchers examine the arithmetical hierarchy, which classifies the complexity of first-order formulas and the sets they define by counting alternations between blocks of unbounded existential and universal quantifiers.

Researchers often analyze the arithmetic hierarchy to understand the complexity of definable sets.

To design an effective advertising campaign, the marketing team mapped each message to a specific stage in the hierarchy of effects.

Students studying formal language theory often begin by learning the Chomsky hierarchy to understand how grammar classes relate.

Marketing researchers compared different hierarchies of effects to determine which model best predicted consumer behavior.

Graduate students compared various Chomsky hierarchies to determine their relative expressive power.

Researchers compared different arithmetical hierarchies to better understand the limits of computable functions.