Exchange
Pass it between parties in both directions; stop when each side holds something that came from the other.
Trade prototypes.
Seen in Giorgia Lupi and Stefanie Posavec, Dear Data, 2014–15
Try it on your work
Trade one thing from your immediate materials for one of someone else's, both sight-unseen or both mid-use, and keep the trade for the rest of the session. What you missed and what you didn't is the inventory you needed.
Swap descriptions with someone: each writes the other's project in five sentences, no corrections allowed, then both are read aloud. The wrongest sentence contains the most information.
Exchange one responsibility with someone for a fixed period: each performs the other's step. The instructions you each had to write to make it possible are the real documentation.
How it has been used
Pass something between parties so the transfer itself is the event: the gift economies Mauss described, the swapped sketchbooks, the borrowed tool that must come back. The move forbids one-way traffic: something must move in both directions, or it's delivery, not exchange.
Where it leads
Grouped under Move the decision or responsibility