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  Architecture - MIDAS
           
  The existing system contains a set of integrated software modules, editors, and analysis tools produced in C, C++, and Lisp, with an architecture based in agent-actors theory.

Each major component, or agent, contains a common message passing interface, a body unique to that agent's purpose, and a common biographer structure which keeps track of important state data or events for analysis.

This uniform representation was chosen to provide modularity. The total system contains 350,000 executable lines of code, with about half of the total associated with a dynamic anthropometry model.

Once a user inputs or specifies operator, task, and equipment characteristics, MIDAS operates in two major modes. The first, Interactive Mode, supports scenario-independent layout of the crew station for assessments of visibility and legibility,examination of anthropometric characteristics, and analyses of cockpit topology and configuration. The output of MIDAS in this mode corresponds to cockpit geometry and external vision design guides, such as MIL-STD-1472 and AS-580B.
 

Image of User view of MIDAS application

User View of MIDAS (Click for Larger View)

 
           
  The other analysis path supported by MIDAS is a dynamic simulation. The Simulation Mode provides facilities whereby specifications of the human operator, cockpit equipment, and mission procedures are run in an integrated fashion. Their execution results in activity traces, task load timelines, information requirements, and mission performance measures which can be analyzed based on manipulations in operator task characteristics, equipment, and mission context.
           
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