Within Jack Danger Canty’s model of Technical Coherence a UX domain is:
Jack Danger Canty 1
A UX domain is an encapsulation of a complex area such that there is a lot happening internal to that area, but very little on the surface.
As an example, the UX domain of “Onboarding” has an input of a non-signed-up user and an output of a signed-up user. Internal to that domain is a set of experiences and features with spiraling complexity, but the “API” is quite simple.
Alternatively, a UX domain is all of the user experiences you facilitate for a user while they are in the same role. A test for splitting a domain is: “Would the UX experience make more sense if it was services by one large team or two smaller teams?”
Domain Encapsulation Quality
A way to evaluate how well we have defined a domain1.
1. Danger, J. Executive Engineering: Practical Engineering Theory for Software Leaders. (The Technical Executive, 2024).