A method for elevator call allocations in an elevator group of an elevator system includes applying statistical traffic forecasts modelling future passenger arrivals in the elevator system; receiving an indication of at least one elevator call; generating, for a fixed parameter, a set of scenarios based on the statistical traffic forecasts; determining a quality attribute for each candidate allocation policy of a set of candidate allocation policies by simulating, for each candidate allocation policy, the set of scenarios according to the candidate allocation policy in a current elevator call allocation situation in the elevator system; selecting a candidate allocation policy based on the quality attributes associated with the candidate allocation policies; and allocating the at least one elevator call to at least one elevator in the elevator group according to the selected candidate allocation policy.