Abstract
A methodology to determine optimal observation locations and its number is proposed based on Value of Information (VoI) and probabilistic spatial interpolation method known as Kriging. The risk of decision error is reduced in a decision making problem under uncertainty when new observation information is given. In the proposed method, VoI is defined as the expected reduction of decision error risk. Observation location is determined such that absolute value of VoI is maximized, whereas the number of observation is determined by minimizing the total cost, which is the sum of observation cost and VoI. In the issue that liquefaction countermeasure region along an existing river embankment is determined, locations and the number of additional boring are studied with the proposed method.
