The notion of a ‘primary generator’ (PG), proposed by Jane Drake, refers to a selfimposed
broad objective that drives designing. PGs are important for designers as
conceptual compasses for navigating design problems. Therefore, it is essential to
understand how they are employed in designing. As most accounts of PGs are retrospective,
they may exclude momentary events which are central to explaining human
designing. Capitalizing on Darke’s hint regarding the interactive nature of formulating
and using PGs (consistent with recent studies on situatedness in design),
we examine the ways in which PGs drive design in real-time. A close analysis of a
design task results in an elaboration of the original concept, revealing a set of action
patterns that are potentially generalizable to other design tasks. Theses serve as a
step in systematically modeling such processes, towards their implementation in
computational design systems.
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