There exists a fundamental belief among mainstream CAAD software developers that a designer?s thought process is mainly driven towards achieving optimum efficiency. This paper argues that designers are not as much concerned with efficiency as much as protecting their personal preference for a certain method of object construction. Identifying and providing support to these methods - referred to here as ?methods-ofmaking,? is hence considered vital to how design efficiency is defined and how future CAAD tools are created. This hypothesis is empirically supported through a study conducted among 30 design students at the School of Architecture and Urban Planning, University of Wisconsin?Milwaukee.