A system called TEMPUS is outlined which is being developed to simulate graphically the task-oriented activities of several human agents in a three-dimensional environment. TEMPUS is a task simulation facility for the evaluation of complex workstations vis-a-vis the normal and emergency procedures they are intended to support and the types and number of individuals who must carry them out. TEMPUS allows a user to interactively: * Create one or more human figures which are correctly scaled according to a specific population, or which meet certain size constraints. * View the human figure in any of several graphical modes: stick figure, line or shaded polygons, or shaded BUBBLEPERSON. * Position the figure in any admissible position within joint angle constraints, and with the assistance of a robotics reach positioning algorithm for limbs. * Combine the figures with three-dimensional polyhedral objects derived from an existing CAD system. * Create shaded graphics images of bodies in such environments. * Use all TEMPUS features in an extensible and uniform user-friendly interactive system which does not require any explicit programming knowledge. A brief summary of the software engineering of this system in a University environment is included. Other features of TEMPUS and differences between TEMPUS and other available body modeling systems are also discussed.