Abstract: Disclosed is a system to determine a first contact probability for each of a plurality of time slots for each of a plurality of first accounts using a trained machine learning model based on a first set of account information and first contact attempt logs, determine a first prioritization for each of a plurality of first accounts based on a second set of account information, and generate a contact schedule based on the first contact probability for each of the plurality of time slots and the first prioritization. The trained machine learning model is trained based on training accounts.