в конкретном случае(according to the particular facts relating to each situation: The only thing we can do is to negotiate on a case by case basis. MED Alexander Demidov)
для каждого конкретного случая(для каждого проекта отдельно: ... projects, i.e. diverse and innovative, the main technical issues (and others) would have to be rediscussed thoroughly for each project on a case-by-case basis. Alexander Demidov)