Why, if a Work Order Status is Rework the Product will not be Available for Demand? This is to make sure that reworked products are checked and transfered into FGI before they are considered available, otherwise, MRP might be counting on product that might not make it to FGI.    If the user has high confidence that the reworked parts are going to be available when they get to FGI, then you would mark the Order Status as Rework Firm, and the product will be considered as available to meet demand.