The Activity Circle focuses on “Self, Other, Thing, and Think”. It is perfect for discussing a special object which has double properties: material property and mental property.
The ARCH Visual Language for Collaborative Project Engagement and Intersubjective Design
We can also apply the ARCH model to discuss Synergy Effects between knowledge centers. Also, we can use Thematic Landscape Map to discover Synergy Effects.
In 2020, I used the ARCH diagram to curate Alan P. Fiske's Relational Models Theory and Clay Spinuzzi’s typology of Activity.
Based on Yrjö Engeström's Activity System Model, I added the concept "Resouce" to explore a new possibility.