completely executed planned process assay Assay the wavelength of light emitted by excited Neon atoms. Count of geese flying over a house. 12/3/12: BP: the reference to the 'physical examination' is included to point out that a prediction is not an assay, as that does not require physical examiniation. A planned process that has the objective to produce information about a material entity (the evaluant) by examining it. Discussion on OBI call 2023-05-01 resulted in an agreement to revise the textual definition of 'assay'. https://github.com/obi-ontology/obi/issues/1683. OBI branch derived PlanAndPlannedProcess Branch assay measuring scientific observation ready for release