“Standard of Review” — In administrative law, this is the amount of deference given by one court or tribunal to a lower court or tribunal, in reviewing a decision. The standards of review are reasonableness and correctness. “Patent unreasonableness” may be useful for demonstrating the threshold of “reasonableness” in a review.
The Supreme Court of Canada clarified the standard of review on appeals in Housen v. Nikolaisen, 2002 SCC 33 (CanLII),  2 S.C.R. 235 :
(i) on questions of pure law, the standard is correctness;
(ii) on findings of fact, including inferred facts, the standard is palpable and overriding error; and
(iii) on issues of mixed fact and law, the standard is palpable and overriding error if the issue is the interpretation of the evidence as a whole, and correctness if the issue is interpretation of a legal standard or its application.
Dunsmuir v. New Brunswick, 2008 SCC 9 (CanLII),  1 SCR 190
MBK Services v. PowerForward Inc., 2013 ONSC 4506 (CanLII)