has specified input has_input organism group assignment group assignment study assignment study assignment Group assignment is a process in which an organism is assigned to a particular group or cohort, such as assignment to a treated and control group. James Malone, modified from original OBI definition (Philippe Rocca Serra) Assigning' to be treated with active ingredient role' to an organism during group assignment. The group is those organisms that have the same role in the context of an investigation OBI Plan Philippe Rocca-Serra cohort assignment cohort assignment group assignment group assignment is a process which has an organism as specified input and during which a role is assigned experimental process ready for release