Friesike, Sascha; Send, Hendrik; Tech, Robin - 2015
innovators in 3D printing do not only innovate for the reasons present in theory. Besides the user innovation that serves a niche … market and the user innovation that responds to consumer demands which are not yet known to firms, the activities on … Thingiverse suggest a third form of user innovation. We label this form of innovation ‘substitutional design’. They are mere …