ˌoperational reˈsearch BrE AmE , ˌoperations reˈsearch noun [uncountable]
the study of the best ways to build and use machines or plan organizations
ˌoperational reˈsearch BrE AmE , ˌoperations reˈsearch noun [uncountable]
the study of the best ways to build and use machines or plan organizations
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012