Abstract
Trial-and-error optimal design discussed in this article is an optimization process which is basically performed based on the designer's own intuition and experience. Such an approach does not have any rational or objective background; it is, however, widely used in the practical design process in many engineering fields. In this preliminary study, we conduct an evaluation of this optimal design process. A simple structural design problem is considered and a computer program which supports as well as records the designer's trial-and-error process is developed. The optimality and other properties of the trial-and-error optimal design process is discussed based on the obtained results.
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