Hitachi Global Storage Technologies Netherlands B.v.

Noboru Takizawa

Hisaya Ishibashi

Chiharu Nakagome

Jun Tateishi

Embodiments of the present invention provide a production planning method and system. Where a manufacturing apparatus is shared by a plurality of products in a production line, if a manufacturing (production) availability number is changed, a cause parameter is automatically investigated so that a production plan with high precision can be prepared in a short time. With respect to a production plan as the previous/current comparison objects, a production process used in the production plan in which a change occurs, is extracted. From the production process, a parameter item to be used in the production capacity evaluation is extracted for all products, a difference comparison is made between the value of the previous parameter and the value of the current parameter, so that the parameter item as the cause is specified. The combination of the cause parameter items is calculated, and a cause parameter list is prepared. Next, from the specified parameter list, the parameter item is sequentially changed, and the manufacturing (production) availability number is recalculated. An influence index given to the manufacturing (production) unavailability number by the cause parameter, is calculated.

Production planning method and production planning system

Embodiments of the invention provide a computer-aided production planning method and system for accurately and quickly drafting a production plan for a given period for a production system employing a production line with a salvage process. In one embodiment, the method includes a new parts supply quantity recalculating step of recalculating the quantities Xof parts to be newly supplied based on obtained actual product yields B, actual production process total supply quantity ratios C, actual production process salvage ratios D, the requested quantities Aof finished products, and correction parameters Ffor the actual production process total supply quantity ratios C; and a production process load determining step of, to draft a production plan for a given period, determining the load on each production process of the production line on each day based on the quantities Xof parts to be newly supplied in such a way that the requested quantities Aof finished products can be produced, the quantities Xbeing recalculated at the new parts supply quantity recalculating step.

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Kanagawa, Japan

Noboru Takizawa