Methods, systems and a machine readable memory are disclosed for adjusting projected demand items on an item-location basis. One environment in which the disclosed technology is useful is retail sales by companies with many items and numerous sales locations. Disruptive events and impact estimates can be calendared and applied to adjust both sales history quantities, which are used to project future demand, and to adjust future projected demand, directly. Impact estimates can be positive or negative, multiplicative or additive. Multiple disruptive events can be handled.