FRACTION DEFECTIVE CALCULATION DEVICE, FRACTION DEFECTIVE CALCULATION METHOD AND FRACTION DEFECTIVE CALCULATION PROGRAM

摘要

To provide a fraction defective calculation device, a fraction defective calculation method and a fraction defective calculation program which can accurately calculate, when manufacturing products from an in-process inventory and a part inventory, a fraction defective determining the proportion between the expected number of non-defective items and defective items for each manufactured item, prevent overproduction of products and shortage of finished products, and maintain a proper inventory.SOLUTION: A fraction defective calculation device 100 comprises a storage part 106 and a control part 102 and calculates a fraction defective of manufactured items, the storage part 106 comprises an initial setting fraction defective storage part 106a storing a fraction defective initially set to a manufactured item and a past result fraction defective storage part 106b storing an actual fraction defective for each lot of the manufactured item, the control part 102 comprises a fraction defective calculation part 102a adding and averaging the past actual fraction defective stored in the past result fraction defective storage part 106b to the initial setting fraction defective stored in the initial setting fraction defective storage part 106a to calculate a new fraction defective.SELECTED DRAWING: Figure 1