Two parties want to coordinate more than they want their preferred option, so any convention beats none.
Luce and Raiffa's 1957 example was a couple choosing between two evenings out. Driving conventions are the pure institutional case: which side is arbitrary, agreeing is everything.
In practice
- Two departments each prefer a different project management tool and both prefer either tool to the current state, where half use each.
- Two teams argue about the naming convention for six weeks; the convention chosen matters far less than the six weeks.