Such renegotiation could jeopardize federal funding and delay construction, but the needless haste created by Washington's arbitrary deadlines have resulted in mistakes that could be extremely costly.

During the long period, It is believed that the mainly reason is the engineering change which results in schedule delay and cost overruns of the construction project.

Project delay is a common problem in the world construction industry today. For the construction of engineering project in our country, this problem is especially outstanding.