prerequisite for the variables for the ANN model

As in statistics, if we apply regression, we conduct correlations or sensetivity analysis or distribution of data etc.

are there any prerequisites or tests before applying the ANN model. should we include all the explanator variables in the ANN model or any criteria for selection of variables for the model?

[KSSV]

If your variables are x1,x2,x3 and taget is y, in ANN we try to get:

y = f(x1,x2,x3)

You should understand that, x1,x2,x3 should vary y. Is it so? Acorellation study will help for this.

[Hassam Jadoon]

Is there any chance of multicollinearity if all the variables are used which high pearson correlation?