  This paper addresses different aspects of "coupled" model descriptions in
computational electromagnetics. This includes domain decomposition, multiscale
problems, multiple or hybrid discrete field formulation and multi-physics
problems. Theoretical issues of accuracy, stability and numerical efficiency of
the resulting formulations are addressed along with advantages and
disadvantages of the various approaches. Examples for multi-method,
multi-domain, multi-formulation and multi-physics coupled formulations stem
from numerical testing of electromagnetic compatibility in complex scenarios
and numerical dosimetry of biological organisms in electromagnetic exposure
situations and from simulations of large systems in electromagnetic power
transmission.
