English to Greek Science Mathematics & Statistics μη παρατηρήσιμες ουρές αναμονής

The model does not allow reneging. However, this assumption
is redundant if we assume that the queue remains unobservable
also after joining.This is because the expected residual waiting time is
non-increasing with the time already spent in the queue


Βασικά εδώ το πρόβλημά μου είναι η σύνταξη κι αυτό το 'with' μετά το non-icreasing κι όχι ο ίδιος ο όρος.