efficacy A disposition of an organism to (i) undergo some bodily benefit that (ii) is triggered by a planned process. William R. Hogan efficacy A disposition of an organism to (i) undergo some bodily benefit that (ii) is triggered by a planned process. Matthew Diller We often say in natural language it is the efficacy of the triggering planned process such as vaccination. However, processes do not have properties such as roles, dispositions, functions, qualities in BFO. And this is also not a process profile, because it is not the process of a quality changing values (determinates) over time. Nevertheless, it is natural to classify efficacies based on the type of triggering process because that is what differentiates what happens when they are realized. For example, a vaccination efficacy will be realized through different processes than a quarantine efficacy. For individual treatments, the triggering process is a treatment (as defined by OGMS). disposition