  Our earlier paper "Patterns of Patterns" combined three techniques from
training, futures studies, and design in a design pattern called PLACARD that
helps groups of people work together effectively. We used that pattern in five
hands-on workshop case studies which took place at various locations in the US
and the UK. This experience report documents what we learned, including the way
our thinking about PLACARD evolved, together with additional patterns our work
generated. We evaluate the reproducibility of our methods and results, and
consider the broader economic implications of this way of working. We discuss
implications of our prototyping work for the design of future platforms,
drawing connections with recent developments in cognitive science and
artificial intelligence. This positions our patterns of patterns as a toolkit
for the design and governance of systems that combine social dynamics with
technical components.
