1. A method comprising: operating a Digital Subscriber Line (DSL) system, the method limited to digital communication over existing telephone subscriber lines in accordance with defined operational characteristics and parameters; determining an operational relationship between a first performance metric relating to the operation of the DSL system and a second performance metric relating to the operation of the DSL system; collecting DSL customer data indicating a DSL customer's preferences for operation of a DSL service provided to the DSL customer via the DSL system, wherein the collected DSL customer data includes direct user information and indirect user information; evaluating the DSL customer's preferences; generating an operational parameter vector value to implement the DSL customer's preferences with regard to the first and second performance metrics in accordance with the defined operational characteristics and parameters of the DSL system; and implementing the generated operational parameter vector value into the DSL system to adjust the DSL service provided to the DSL customer of the DSL system.