This rejection of any particular formula or methodology or test the application of which will yield an answer to the question whether there exists in any given circumstance a duty of care, and if so, its scope or content, has been accompanied by the identification of an approach to be used to assist in drawing the conclusion whether in novel circumstances the law imputes a duty and, if so, in identifying its scope or content. If the circumstances fall within an accepted category of duty, little or no difficulty arises. If, however, the posited duty is a novel one, the proper approach is to undertake a close analysis of the facts bearing on the relationship between the plaintiff and the putative tortfeasor by references to the "salient features" or factors affecting the appropriateness of imputing a legal duty to take reasonable care to avoid harm or injury.
These salient features include:
(a) the foreseeability of harm;
(b) the nature of the harm alleged;
(c) the degree and nature of control able to be exercised by the defendant to avoid harm;
(d) the degree of vulnerability of the plaintiff to harm from the defendant's conduct, including the capacity and reasonable expectation of a plaintiff to take steps to protect itself;
(e) the degree of reliance by the plaintiff upon the defendant;
(f) any assumption of responsibility by the defendant;
(g) the proximity or nearness in a physical, temporal or relational sense of the plaintiff to the defendant;
(h) the existence or otherwise of a category of relationship between the defendant and the plaintiff or a person closely connected with the plaintiff;
(i) the nature of the activity undertaken by the defendant;
(j) the nature or the degree of the hazard or danger liable to be caused by the defendant's conduct or the activity or substance controlled by the defendant;
(k) knowledge (either actual or constructive) by the defendant that the conduct will cause harm to the plaintiff;
(l) any potential indeterminacy of liability;
(m) the nature and consequences of any action that can be taken to avoid the harm to the plaintiff;
(n) the extent of imposition on the autonomy or freedom of individuals, including the right to pursue one's own interests;
(o) the existence of conflicting duties arising from other principles of law or statute;
(p) consistency with the terms, scope and purpose of any statute relevant to the existence of a duty; and
(q) the desirability of, and in some circumstances, need for conformance and coherence in the structure and fabric of the common law.
There is no suggestion in the cases that it is compulsory in any given case to make findings about all of these features. Nor should the list be seen as exhaustive. Rather, it provides a non-exhaustive universe of considerations of the kind relevant to the evaluative task of imputation of the duty and the identification of its scope and content.[26]