Since each designed element in the Revit model has its own status, the status light on the ribbon bar summarizes the conditions of the model by displaying the worst status currently found. For display purposes, severity of status is ranked from “best” to “worst”, where, “worst” is defined as the most severe cause for concern for the design professional (i.e., failing unity).
If all elements in the model are passing their unity checks, then the status light will show green.
If the worst element status found in the model is a pending, cancelled, or incomplete status, then the status light will show yellow.
If worst element status found in the model is a change warning, then the status light will show orange.
If worst element status found in the model is a unity check failure, then the status light will show red.