radical change

Translations
радикальное изменение
The company underwent a radical change in its management structure.
Компания претерпела радикальное изменение в своей управленческой структуре.
Definitions
A significant and fundamental transformation that alters the core aspects of a system, process, or situation, often leading to dramatic and far-reaching effects.
Words
radical

adjective
радикальный
change

noun
изменение