A method includes maintaining descriptions of a plurality of information technology resources in a computer-readable storage medium. The method includes maintaining a plurality of evaluation strategies, wherein the evaluation strategies associate a plurality of rules with forms of changes to the plurality of information technology resources. Responsive to detecting a command to change a first property of the set of properties of a first information technology resource of the plurality of information technology resources, the method determines that a first of the evaluation strategies associates at least one of the plurality of rules with a form of the change to the first property of the first information technology resource. Also, responsive to detecting the command, the method evaluates the at least one of the plurality of rules and performs the operation of the at least one rule.