expression, noun which may take the genitive case particle 'no'
already introduced; already installed; already implemented; already in place
Used to describe systems, equipment, rules, or methods that have already been put into use. Often modifies nouns with の.
The latest equipment has already been installed in this factory.
No problems have been found with the system that is already in place.
Compound of 導入 (introduction) and 済み (completed, finished).