This time we want to test the performance of the models with a new sample set that, I have imported as Validation Set (so it is not divide into, training and validation as in other cases).
First we check if there are any strange spectrum (which is not the case), so we go to Models _ Predict to see how the new samples appear in the XY validation plot versus the samples we have used during the development of the model. A clear bias appear, so we have to improve the model adding this new variability (new company, new batches, samples much more recent than the used in the calibration, new instrument, different laboratory,….).
