be measured against a predictable standard of care, the possibility of litigation may tend to discourage the making of clear choices. It is in the public interest to avoid such a chilling effect upon the servant’s performance of his duties. Where, on the other hand, a standard of care may be defined and applied with relative ease, the public servant is not similarly deterred and the public interest in the protection of the official weakens. Also relevant to the strength of the public interest is the potential impact of the challenged decision or action upon the public as a whole or upon a large segment of it. The greater or more pervasive this impact, the stronger becomes the public interest in insuring unfettered decision-making.
Id. Moreover, the Court emphasized that only those persons who have “engaged in actionable conduct” should be subject to suit. Thus, those in the “chain of command” should not be subject to liability on any theory of vicarious liability. Id. at 295.
In Cerino v. Twp. of Palmer, - Pa.Super. -, 401 A.2d 770 (1979), the Pennsylvania Superior Court analyzed for the first time the contours of DuBree. Cerino involved a claim of official immunity by a township engineer whose alleged negligence had caused property damage to plaintiff’s home. The court delineated its role under DuBree as follows:
Although DuBree has now restricted grants of official immunity to a case by case basis, we believe that, where the defense of immunity from suit is asserted by or on behalf of any public servant, the threshold inquiry, as in pre-DuBree cases, must concern “the nature of his duties, the importance of his office, and particularly whether or not he has policy making functions.”
In considering the instant case, therefore, we must determine the nature and scope of Mr. Elo’s duties as Township Engineer, and the course of conduct in which he was engaged at the time of the alleged tortious act.
Cerino v. Twp. of Palmer, supra at - - -, 401 A.2d at 772.
The court focused on the distinction between policymaking or discretionary duties and non policymaking or ministerial duties. Citing Jackson v. Kelly, 557 F.2d 735 (10th Cir. 1977), it explicated that “a duty is discretionary if it involves judgment, planning, or policy decisions.” Id. - Pa.Super. at -, 401 A.2d at 773. And the fact that a duty involves expert evaluations does not necessarily render it discretionary. Id.
After analyzing the statutory definition of the duties of a township engineer, the court concluded:
The challenged acts have virtually no impact upon the public as a whole or upon a large segment thereof. Elo was merely supervising engineering planning and construction in the field, and not setting government policy regarding such matters.
Id. at -, 401 A.2d at 775.
We are convinced that, when construing DuBree and Cerino, our role is to assess two factors: (1) the nature and scope of the duties of the Commonwealth employees; and (2) their course of conduct at the time they were engaged in their alleged tortious acts.
The second factor involves an assessment of whether the conduct in question can be measured against a predictable standard of care and whether the employee himself has engaged in actionable conduct.
In the instant case, the motions of the Commonwealth employees shed little light on the nature and scope of the duties of the employees involved. There is no documentation which would enable this court to conclude as a matter of law that any or all of these employees perform policymaking or discretionary functions so as to warrant attachment of official immunity. Similarly, we are unable to conclude that their conduct cannot be measured by a predictable standard of care, or that they were simply in a chain of command and committed no actionable conduct themselves. As such, we are unable to hold at this juncture that “the considerations underlying ‘official immuni