What is the scope of an expert’s report?
Ontario, Canada
The following excerpt is from Hacopian-Armen Estate v. Mahmoud, 2021 ONCA 545 (CanLII):
The expert’s report is required to contain certain information set out in r. 53.03(2.1), including the expert’s opinion concerning each issue to which the report relates and the expert’s reasons for their opinion. It must include the factual assumptions on which the opinion is based, any research conducted by the expert and any documents relied on by the expert in forming the opinion. It is well-settled that the report must not simply set out the expert’s conclusions, but must also set out reasons for their opinion: Marchand (Litigation guardian of) v. Public General Hospital Society of Chatham, 2000 CanLII 16946, at para. 38, leave to appeal refused [2001] S.C.C.A. No. 66; Hoang v. Vicentini, 2012 ONSC 1358, aff’d 2016 ONCA 723, at para. 10.
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