phase something ↔ in phrasal verb ( see also ↑ phase )
to gradually start using a new system, law, process etc:
The new tests will be phased in over the next two years.
phase something ↔ in phrasal verb ( see also ↑ phase )
to gradually start using a new system, law, process etc:
The new tests will be phased in over the next two years.
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012