Changing Rule Priority 
Priorities govern the order in which rules are fired.
In the Rules Navigator view, expand the project node and select the ruleset or flow ruleset.
Under the Rules section, select the rule and choose Open.
Under the General Information section, select the value next to the Priority field.
The value editor and the
(Calculate) appears
Note
You can also use the
(Calculate) to enter values.
Click the
(Calculate) and in the calculator that appears, enter the values and choose Ok.
Enter the value.