Abstract
The main aim of this article is to introduce the role of the continuous, or professional development, training of the labour force in a computer-aided technology (CAT) context. Retraining is an important topic today because of the importance of optimising available human resources. In this line, we introduce a synthesis of the main competencies to guarantee the success of continuous training in terms of technological changes and obtaining expertise. Moreover, we consider some particular characteristics of the training process within the technological context.