This paper represents an educational practice aiming at analysis of the link between digital design and digital manufacturing. CFD (conception, fabrication, digitale) is a one week workshop with graduate (master recherche) students of architecture school of Nancy. Having passed the first semester with a focus on modelling principles, computational logics and formal data representation, students are well prepared to apply them all in the process of form generation. The exercise is based on experimenting with new approaches in computational form generation interweaving geometry, aspects of construction and fabrication technologies.