1. A heuristic control system for use with a computer-aided design, comprising: processing means including a predetermined learning pattern and a rule-invoking system; evaluation means for evaluating an operational result of the processing means; means for generating a training pattern based on a result obtained from the evaluation means; and neural network means for learning to control the processing means by means of the training pattern supplied by the training pattern generating means.
1. A heuristic control system for use with a computer-aided design, comprising: processing means including a predetermined learning pattern and a rule-invoking system; evaluation means for evaluating an operational result of the processing means; means for generating a training pattern based on a result obtained from the evaluation means; and neural network means for learning to control the processing means by means of the training pattern supplied by the training pattern generating means. 2. The heuristic control system as recited in claim 1, wherein the training pattern generating means compares a plurality of evaluation results obtained by the evaluation means so as to choose a pattern with a favorable result.