
358 ◾ Software Designers in Action: A Human-Centric Look at Design Work
© 2010 Taylor & Francis Group, LLC
by Joe’s denition of it which embodies his preferred solution—it does do a disagreement
encapsulation job and serves to allow this contentious part of the design to be referred to
without reopening it as an issue to be resolved, at that moment, between the designers.
To serve the same disagreement encapsulation function, Carla uses the term trac pat-
tern. She introduces its specic meaning at [1:27:55] with, “your map is a named object
your intersection is a named object and your trac patterns are named object” (so far so
good!