  Eclipsing binaries are extremely attractive objects because absolute physical
parameters (masses, luminosities, radii) of both components may be determined
from observations. Since most efforts to extract these parameters were based on
dedicated observing programs, existing modeling code is based on interactivity.
Gaia will make a revolutionary advance in shear number of observed eclipsing
binaries and new methods for automatic handling must be introduced and
thoroughly tested. This paper focuses on Nelder & Mead's downhill simplex
method applied to a synthetically created test binary as it will be observed by
Gaia.
