1. A method of managing a machinery monitoring system including a database of at least one rule set, the rule set including at least one rule expressed as a relational expression of a real-time data output relative to a real-time data input, the relational expression being specific to a plant asset, said method comprising: importing data representative of a rule set into the machinery monitoring system, the data including rule set full operand relative path information; applying the at least one rule set to a specific plant asset that is monitored by a plant monitoring and control system wherein the at least one rule set is configured to locate the data input using at least a portion of the full operand relative path information; determining a data output of the at least one rule set using the at least one relational expression and the data input; and transmitting the data output to at least one of the machinery monitoring system and the plant monitoring and control system.