Abstract
The dumping prevention system have greatly decreased the low price of successful biddings in the Quality and Cost Based Selection System(QCBS). On the other hand, many bidding prices are immediately above the threshold price for low price inquiry. Some possibilities emerged after the interviews with bidders. The reason of such bidder's action seems that many bidders didn't consider about capabilities of their own engneerings, when they decided the bidding price.
On this study, we review the latest trend of QCBS, and examine the recent problem of QCBS, that is way of evaluation approach about quality and price.