One function that we need in order to provide good service to our customers is the ability to allocate sales orders based on order type.  In our business we take preseason orders, which are orders taken 6-8 months prior to the scheduled delivery date, and allow the factory time to produce the product and ensure that customers who placed these orders are allocated the stock.  These orders take first priority when allocating stock.  We also have reorders, which are orders placed by existing customers who placed preseason orders for these same items.  Reorders take second priority to preseason orders.  Then