Abstract: A method for managing parameters associated with a product or service order by a user and its subsequent delivery to the user; the method comprising inputting order data into a digital device thereby to define an order; transmitting the order to a queue management server; receiving historical data associated with the order; receiving substantially real time data associated with the order thereby to define an estimated pickup/delivery time coinciding with the estimated order fulfilment time. Also disclosed is a system for implementing the method. Also disclosed is a local queue management processor or engine.