This book presents a generic solution to this correspondence problem by treating it as part of the learning process. We will see that the key is to treat model construction as an optimisation problem, thus automating the process and guaranteeing the effectiveness of the resulting models. The other subject covered in this book is the evaluation of statistical models. This is also an important aspect of modelling since it allows us to quantify the likely utility of the model in practical applications. Model evaluation methods are established for cases with ground truth or in its absence.