27. The computer program product according to claim 26 , wherein payment is determined according to a payment function associated with the PPS.
27. The computer program product according to claim 26 , wherein payment is determined according to a payment function associated with the PPS. 28. The computer program product according to claim 27 , wherein a PPS comprises a plurality of classification levels defining the payment, the plurality of classification levels comprising: a driving element level including a set of driving elements used to encode the service provider activity at a transactional level; a group level including a set of groups, each group mapping one or more driving elements to a particular payment rate; and a category level including a set of categories, each category being mapped to one or more of the groups according to predetermined industry classification schemes.