This paper is about Case Based Instruction (CBI) and not about computer
implemented Case Based Reasoning systems, as some readers tend to assume.
CBI is a very old method of teaching, particularly in the studio setting. Usually it takes
the form of precedent analysis. An empirical study was conducted in order to better
understand how experienced designers use cases in the course of a brief design
session. Based on this experience a computer based case tool, Electronic Design
Assistance Tool (EDAT), was developed and used in studio instruction. Finally, our
experience with case based instruction in non-design courses is described.