Whereas a traditional designer might think of their work as designing an object, or a mechanism, a “system of action” is a “coherent collection of interrelated components” which creates change.
Systems of action are constructed to allow participants to effect substantial change through small actions, and indeed don’t necessarily require the participation of all inhabitants to generate that change.
Pendleton-Jullian, A. M., & Brown, J. S. (2018). Design Unbound (Vol. 1–2). MIT Press. Pendleton-Jullian and Brown, Design Unbound