PROBLEM TO BE SOLVED: To provide a simple method capable of adjusting stock to minimum stock without waste within a range not causing a shortage of the stock when storing the stock before stopping a plant for a periodical inspection or repair, in manufacturing industry producing a large number of brands by a continuous production process. SOLUTION: This production planning method has the following means (1)-(5): (1) a standard lot size is set to each brand; (2) a standard stock amount (a first standard stock amount) to a replenishment period corresponding to a production plan target period, and a standard stock amount (a second standard stock amount) to a replenishment period corresponding to a period to completion of a stop period of the plant from production plan drafting are set; (3) a first lot having a margin not more than a preset upper limit value is extracted; (4) a lot is extracted from the brands each having calculated stock not reaching the second standard stock amount; and (5) a production schedule for producing the extracted lot is decided. COPYRIGHT: (C)2004,JPO&NCIPI
