PURPOSE:To support a numerical analysis and simulation system instead of a specialist by effectively incorporating the numerical analysis and the simulation and the expertise, know-how and data of the numerical analysis and simulation system. CONSTITUTION:By referring to the information contents of a condition storage part 4 (104) and sending a retrieving command to a knowledge base storage part 2 (106), an inference mechanical part 3 receives only necessary knowledge in accordance with a condition (107). An inference is executed by the contents of the knowledge, and in such a time, the information is exchanged with a user through the reference of the information contents of the condition storage part 4 (104) or a user interface 5 (101 and 108). The condition and result of the inference is written into the condition storage part 4 (105). By using an output part 7 with the instruction of the inference mechanical part 3 (103), the condition and result of the inference for the user are displayed and outputted.
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