The Historical Driven By setting determines whether consumption for purchasing will be based on historical consumption according to data in the system from posted periods or on projected consumption according to the menu plan.
- Selected Periods – This option is available only to cruise ship users, where users can choose posted voyages on which to base their consumption. For other (non-ship) locations, this will currently default to using historical data from the four most recently posted periods.
- Current/Historical – This option lets users determine the number of recent and historical periods to use in projecting consumption, and to assign relative weights to the data. For example, if "Current" is set to 5 periods at 60%, data will be used from the most recently posted period and the four periods preceding it. If "Historical" is set to 4 periods at 40%, data will be used from the oldest posted period that is not more than one year old, and the three periods that followed it. The "current" number will be multiplied by 0.60 (60%), and the historical number will be multiplied by 0.40 (40%), and then these two numbers will be added together.
- Menu Planner – Check this box if Projected Consumption is to be derived from menus defined in this module, for recipes linked to a menu. Recipes not linked to a menu will use the Current/Historical setting above.