To scale back means the same as to scale down . ( mainly AM )
Despite current price advantage, UK manufacturers are still having to scale back production.
= reduce
PHRASAL VERB : V P n (not pron) , also V n P
SCALE BACK
Meaning of SCALE BACK in English
Collins COBUILD Advanced Learner's English Dictionary. Английский словарь Коллинз COBUILD для изучающих язык на продвинутом уровне. 2006