To start production before ordering by forecasting ordering from an agency on the basis of forwarding information from the agency to a retail store and stock information in the agency.

A server device 2 is provided which acquires forwarding information for each of article numbers of articles forwarded from the agency to the retail store and stock information for each article number in the agency, and the server device is provided with a database 21 where acquired forwarding information and stock information for each article number from each agency are stored, a forecasting means 22 which forecasts the quantity of future ordering from each agency with respect to each article number on the basis of stored forwarding information and stock information for each article number from each agency, a totalizing means 23 which sums up forecast quantities of ordering for each article number from all agencies, and a production plan making means 24 which takes the quantity obtained by subtracting a forecast stock quantity from a preliminarily replenishment point as the quantity of production plan to make a plan in the case that the forecast stock quantity obtained by subtracting the forecast quantity of ordering from the stock quantity in a maker is equal to or smaller than a preliminarily set ordering point.