The taxonomy of training objectives corresponds to a classification of the levels of thinking learners should attain. Skills may be measured on a scale ranging from straightforward to complex and from something concrete to something abstract. The level of complexity increases in pro-portion to the taxonomy levels. Their classification ranges from a straightforward recitation of information (learnt by heart) to more complex notions (justifications and problem solving).

The taxonomy model was developed by the American learning theorist Benjamin Bloom. It is used in a simplified form in vocational education and training in the professional competences model (PC model) and the competences-resources model (CoRe model).

Learning objectives are classified into several categories: cognitive, affective and psychomotor. VET programmes tend to place emphasis on cognitive objectives, which can be found either in the training plan established for the VET programme in question or in the general outline for apprenticeship training. VET examiners also take the various levels into consideration when they prepare examinations.