A method and apparatus are provided for filling a gap of missing data using source specified data. The dual damascene structure includes a first dielectric layer and a second dielectric layer. The modeling function may have at least one input variable and a first set of one or more coefficients. The processor is configured to monitor the information and make observations about the customer’s use of the account services and features, and use the communication device to communicate a notification message containing information relating to how the customer could better utilize the account services and features. When the first signal is detected, the means for signal associating can prevent the typing input device from transmitting the second signal into the operating system of the tablet personal computer. The prognostic signal may be used to activate redundant sensor.