An experiment carried out for the purpose of testing the effect of a perturbing agent in a biological system, measuring one or multiple effect(s) of the agent facilitated by an assay design / assay technology to translate the perturbation into a detectable signal to arrive at one or multiple endpoint(s) that quantify or qualify the extent of the perturbation. Bioassay is described by multiple bioassay components: format, perturbagen, meta target, technology, detection method, and endpoint. Bioassay includes one or multiple measure groups to describe multiparametric (or multiplexed) assays (assays that measure more than one effect of the perturbagen on the system that is screened).