Abstract: A budget software application is provided to aid corporate client systems in analysis of electronic invoices from law firm systems by: prompting at least one of the corporate client systems to provide invoice identifying information to properly identify an invoice from one of the law firm systems, the invoice identifying information including at least an identified billing matter; prompting at least one of the corporate client systems to define a budgeted item; prompting at least one of the corporate client systems to define a budgeted amount for the budgeted item; and storing the budgeted item and the budgeted amount. A rules engine that permits creation of rules for such budgeted items is also provided. Machine readable medium and related electronic invoice processing systems having such media for performing such functions is also provided.

Abstract: A method of processing data in an invoice processing system having a plurality of customer systems includes the steps of: identifying each of the plurality of customer systems; and creating a data module set associated with each of the plurality of customer systems. An electronic billing system includes a plurality of customer systems and a data center configured to receive data from the plurality of customer systems, where the data center includes a data base. The data base further includes a data module set for each of the plurality of customer systems.

Abstract: A rules engine application for an electronic invoice processing system prompts a user to create a billing rule to aid in electronic invoice analysis includes the steps of: prompting the user to define a first portion of the rule having a first violation condition; prompting the user to define a second portion of the rule having a second violation condition; and prompting the user to select a first Boolean operator having a first logic operation to logically join the first portion and the second portion of the rule. A machine readable medium and related electronic invoice processing systems having such a machine readable medium that stores instructions for performing such functions are also provided.