Abstract
As designing is a problem-solving for which drawing activity is indispensable, it is natural to expect that the underlying strategy of making a series of drawings for a design solution would reflect the nature of design problem-solving behaviour. This paper aims at finding out the architects' strategies underlying their fluent production of drawings, from their concurrent verbalization during experimental design session. The verbal data of the 3 practicing architects are encoded for each drawing phase, according to the improved version of Eckersley's4) coded verbalization types for protocol analysis, before factor analysis is applied. 2 factors are pointed out and defined as inference factor and substantial thinking factor. It is suggested that, throughout the seriese of drawing phases, each architect searches the solution along the 2 axis of inference and substantial thinking, and 2 cyclic search strategies are identified as a result.