Abstract: An order management tool, method, and system are disclosed. The order management tool can use clusters of two or more locations to generate fulfillment plans for orders. The order management tool can determine whether a cluster can fulfill an order and, if so, can determine, for each item of an order, a location within the cluster from which to send the item. The items may be consolidated at a sortation center. The locations can be stores and the clusters can cover a geographical area. The order management tool can also generate two fulfillment plans, one of which allocates the order within the cluster and one of which may use one or more locations outside of the cluster, and the order management tool can apply rules to compare the two fulfillment plans and select one of them.