In one embodiment, a fulfillment request is received. A solution set comprising a plurality of fulfillment solutions is determined. The solution set, including values for fulfillment solutions according to a plurality of negotiation attributes, is presented. Selection of a negotiation attribute to be prioritized is invited. The solution set is redetermined according to a selected negotiation attribute. A redetermined solution set is presented. The fulfillment request is fulfilled according to a solution selected from the redetermined solution set.