| Subject | English | Russian |
| automat. | functional decomposition | функциональная декомпозиция |
| IT | functional decomposition | функциональная декомпозиция (a process of breaking down a functional domain into smaller, more manageable pieces. In software, this often translates to breaking down large, complex functions or methods into smaller ones that each handle a specific sub-task.) |
| math. | functional decomposition | функциональное разложение |
| progr. | functional-hierarchical decomposition | функционально-иерархическая декомпозиция (ssn) |