Get Input Data 1. finds all the orders that need to be reallocated Map Phase 1. For each sales order from get input data, finds all the open sales order item that needs to be reallocated Reduce Phase 1. Decommits all the sales order lines that need to be reallocated and recommits them in the correct order 2. check a box on each record that was modified so the shipping people get a heads up that things have changed.