污染区域的位点调查成本很高。从社会角度来看,花费在调查上的经济资源应当不多不少,这样,社会有限的资源能得到最佳利用。解决办法是设计经济的调查计划,可通过信息价值分析(VOIA)来完成。信息价值分析的原理是对信息目前状态下的利益与完成一次调查后预期的利益进行比较。位点调查信息价值分析的框架依据贝叶斯定理的风险-成本-利益决策分析来进行介绍。VOIA方法的优点在于它能促成人们清晰的思考并使决策者对使用其他方法时所忽视的问题进行认真考虑,对问题能更好地把握。主要缺点是VOIA模型的复杂性。 Site investigation in contaminated areas is costly. From a social point of view, the amount of economic resources spent on the investigation should be very small, so that the limited resources of society can be best utilized. The solution is to design an economic survey plan, which can be done by the Information Value Analysis (VOIA). The principle of the information value analysis is to compare the interest under the current state of the information with the expected benefits after completing a survey. The framework of the value analysis of site survey information is introduced according to the risk-cost-benefit decision analysis of Bayesian theorem. The beauty of the VOIA approach is that it enables people to think clearly and give policymakers a better grasp of the issues by carefully considering the issues they overlook when using other methods. The main disadvantage is the complexity of the VOIA model.