After having chosen the approximate model to be taken as a basis for the control design, the designer can avail himself of identification techniques for an accurate estimation of the model parameters.

Within the EICAS methodology an identification method has been developed, which optimises the parameter estimation in relationship with the model objective to build up the foundation for designing the control.

Note how – being the model an approximation of the plant – it does not exist the true value of its parameters and how furthermore it does not make sense to talk about their optimum estimate except in connection with a clearly defined objective.

The objective of the EICAS identification method is the control performance for whose design the model has been conceived.