System, method, and computer program product for creating a production plan

7) A production plan creation system, comprising:

• a first order information storage section for storing order information including information concerning options to be attached to an individual product;
• an order information selection section for selecting specific order information from said order information stored in said order information storage section based on said information concerning said options;
• and
• a production plan creation section for incorporating into a production plan said order information selected in said order information selection section;
• wherein said order information selection section sets up an ideal ratio of products for each option to the number of products to be produced in a predetermined term, and selects said specific order information to be subsequently incorporated into said production plan, in accordance with said ideal ratio and a number of products which have been completed in incorporating said order information into said production plan in said production plan creation section.

8) A production plan creation system, comprising:

• an order information storage section for storing two order information groups having different appointed terms of delivery;
• an order information selection section for selecting order information from said two order information groups based on a load in a production process;
• and
• a production plan creation section for creating data of a production plan by incorporating, into said production plan, order informations selected from one of said two order information groups having a longer appointed term of delivery after incorporating, into said production plan, order information selected from another of said two order information groups having a shorter appointed term of delivery.

9) A method of creating a production plan of products in a computer system, comprising the steps of:

• (a) selecting specific order information from an order information group associated with orders for a plurality of products, based on an individual product specification;
• and
• (b) incorporating said selected order information into a production plan;
• wherein, in step (a), an option which is attached to said product is used as information for judging said specification and an ideal ratio of products is set up for each option to the number of products to be produced in a predetermined period and specific order information is selected from said order information group based on the number of products for which order information has been incorporated into said production plan in said step (b) and said ideal ratio.

15) A program product for making a computer system execute steps of:

• (a) selecting specific order information from an order information group associated with plural production orders based on options to be attached to an individual product;
• and
• (b) incorporating said selected order information into a production plan;
• wherein, in step (a), an ideal ratio of products is set up for each option to the number of products to be produced for a predetermined period and, in step (b), specific order information is selected from said order information group based on the number of products which have been completed in incorporating said order information into said production plan and said ideal ratio.

16) A computer program product for making a computer system execute the steps of:

• selecting order information for a product from an order information group in association with a plurality of orders for products stored in a data base, based on a load in a production process for said products;
• and
• creating data of a production plan by incorporating selected order information into the production plan;
• wherein the step of selecting order information is performed for two order information groups having different appointed terms of delivery;
• and
• in the step of creating data of a production plan, order information selected from one of said two order information groups of products having a longer appointed term of delivery is incorporated into said production plan, after incorporating, into said production plan, order information selected from another of said two order information groups having a shorter appointed term of delivery.