Meaning first
The system identifies what the person needs to understand.
STATIC RIGHT-SURFACE RULE
The principle that an output uses the least intrusive available channel that can carry its meaning correctly.
INSIDE STATIC RIGHT-SURFACE RULE
Purpose, systems, and connections.
Right-Surface Rule considers the particular job, signal and moment. A direction might need a haptic cue, a call might use private audio, and a low-priority update might wait without interrupting.
Available channels
Eligible audio, visual and haptic surfaces are considered in context.
Minimal interruption
The chosen output avoids unnecessary duplication across worn devices.
How it connects
There is no universal primary wearable. The primary surface depends on the task, context and the person’s permissions.