Abstract
In this study I proposed scheme to analysis quantitative value of prior art search using Bayesian decision theory. I focused on two risk parameters 1) strategic advantage about element technology, 2) patentability of element technology. It was found from the result that these two risk parameter are closely connected with quantitative value of prior art search. And especially I found that the more unclear 1) strategic advantage about element technology and 2) patentability of element technology, the higher quantitative value of prior art search. These results lead us to the conclusion that we can explain the importance of prior art search from quantitative point of view.
