Patent ID: 7805395

Claim:
A method for placing outbound calls to accounts during a campaign period, each account having account information, the method comprising: dividing the campaign into plural time periods; dividing a sample population of accounts having call results into the plural subpopulations based upon a characteristic of a variable of the sample population; analyzing the subpopulations to identify at least one subpopulation having an inadequate sample size; selectively combining the identified subpopulation with one or more of the other subpopulations; generating a model for each subpopulation remaining after the selectively combining, the model predicting call results for outbound calls; applying the account information to the models with a computer system to predict outbound call results for the accounts during the plural time periods; and placing outbound calls with a telephone dialer to the accounts based at least in part on the predicted outbound call results; wherein selectively combining the identified subpopulation further comprises combining only the subpopulations having consecutive time periods and optimizing the combining of the subpopulations to minimize the maximum length of the time periods associated with the combined subpopulations.