Your priorities can be set either for a whole segment or for individual constituents, allowing you to focus your callers’ efforts where you need it.  Priorities will set where each constituent sits in the call queue, but specific constituents can be set to be attempted more often than others if they are higher priority.  Callback appointments will always trump other priority settings to ensure that your commitments are honoured.  By default, those who have been attempted the least will be prioritised to ensure the best contact rate, but you are always in control to over-ride this when you need to.