This paper presents a study aimed at developing an understanding of how preparatory computer based learning activities can affect the operators’ ability to develop skills for new assembly operations. The study explores two computer based learning models and their potential as a preparation method for making cognitive learning related to new assembly operations more effective. The results indicate that one of the learning models investigated has advantages regarding competence level for the expert/instructor as well for the common understanding of new operations within a team of five operators and a team leader.