What is the standard for reasonableness in the context of a judicial review?

This standard was described in Dunsmuir v. New Brunswick , 2008 SCC 9, at para 47 as follows: Reasonableness is a deferential standard... A court conducting a review for reasonableness inquires into the qualities that make a decision reasonable, referring both to the process of articulating the reasons and to outcomes. In judicial review, reasonableness is concerned mostly with the existence of .. justification, transparency and intelligibility within the decision‑making process. But it is also concerned with whether the decision falls within a range of possible, acceptable outcomes which are defensible in respect of the facts and law.