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Compared with human critics, todayís computer-based critiquing systems deliver feedback in quite restricted manner. Therefore, we develop the Flat-pack Furniture Design Critic (FFDC) that supports various delivery types and communication modalities by adopting the typical system architecture of constraint-based intelligent tutors and by identifying the critiquing steps from critiquing practice.
A user draws an axonometric diagram using a pen and a tablet. FFDC parses and examines the userís design to identify critiquing opportunities using predefined constraints. Each constraint is associated with a set of written comments and graphical routines to present critiques using five delivery types and three modalities. In order to determine which delivery type and modality to use for critiquing, the system maintains a model of the user. This user model represents (1) the history of violated and satisfied constraints, (2) previously used delivery types and modalities, and (3) the furniture parts that are relevant to the violated constraints. FFDCís Pedagogical Module selects a specific pair of delivery type and modality by considering data from the user model (e.g., how many times a particular constraint is violated and what critiquing methods have already been used). Once a specific pair of delivery type and modality is selected, the system uses appropriate rendering module to deliver feedback.
last updated 4.23.2009 by Yeonjoo Oh