Abstract: A rules engine uses a set of sequenced rules in determining which rule to apply when assigning buyers in a procurement organization to requisitions submitted to the procurement organization. The rules are user-configurable to provide flexible reconfiguration of how the rules engine determines buyer assignments. Attributes of the requisitions may be utilized to determine the appropriate buyers by comparing the attributes with the rules. Sequencing of the rules allows for prioritization of the rules in instances where multiple rules may be applicable to a received requisition. Updates to a rule set can be tested on sample requisitions to allow users to see the results of the updates.