Scenario > In the execution of the small and medium-sized rivers improvement business, since estimating the cost of the running knot blocks construction etc was failed, the cost of construction became expensive.

01.

Carelessness

02.

Insufficient Precaution

03.

Insufficient Analysis or Research

04.

Insufficient Prior Research

05.

Regular Operation

06.

Nonobservance of Procedure

07.

Possible Damage

08.

Potential Hazard

In the execution of the small and medium-sized rivers improvement business, since estimating the cost of the running knot blocks construction etc was failed, the cost of construction became expensive.

Field	Civil Engineering
Author	YONEZAWA, Akio (The University of Tokyo)