e the order of evaluation is undefined.</em></p><p><strong>When is precedence useful?</strong> Whenever the routing story for a particular service is purely weight based, it can be specified in a single rule, as shown in the earlier example. When, on the other hand, other criteria (e.g., requests from a specific user) are being used to route traffic, more than one rule will be needed to specify the routing. This is where the rule <em>precedence</em> field must be set to make sure that the rules are evaluate