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Question

成本预测[1-5]一般有定性预测和定量预测两种方法，定性的预测方法也称直观预测方法，是一种古典预测方法。侧重于对事物性质的分析和预见。定性分析预测方法主要有：专家预测法、德尔菲法、主观概率法等。专家预测法又包括个人判断预测法，专家会议法和头脑风暴法。定量预测是对预测对象未来数量方面的特征所作的预测。定量预测主要依靠历史统计资料，运用科学的方法建立数学模型，并利用这一模型来预测对象可能表现的数量。比较常用的主要有：时间序列预测法、回归分析法、灰色预测法等等。

Answer 1

Cost projections [1-5] have a general qualitative and quantitative forecast predicted two methods of qualitative prediction method also called intuitive forecasting methods, is a classical prediction methods. The nature of things is focused on the analysis and predictable. Qualitative analysis and forecasting methods are: experts predict, Delphi method, the subjective probability law. Experts predict Act is forecasting method including personal judgement, the experts meeting of the minds and turmoil law. Quantitative prediction of the number of future forecast target by the characteristics of the forecast. Quantitative prediction rely mainly on the history of statistical information, to use the scientific method of a mathematical model, and use this model to predict the performance of the number of possible targets. The more common are: time-series forecasting method, regression analysis, grey forecasting method and so on.

Answer 2

The cost forecast that [1-5] has the qualitative forecast and the quota generally forecast two methods, the qualitative forecast technique also said the direct-viewing forecast technique, is one classical forecast technique. Stresses to the thing nature analysis and the foresight. The qualitative analysis forecast technique mainly has: The expert forecasts the law, the Deerfei law, the subjective probability law and so on. The expert forecast that the law includes individual judgement forecast law, the expert conference law and the brains storm law. The quota forecast is to forecast the object quantitative aspect's characteristic will do in the future forecast. The quota forecast main dependence history statistical data, the utilization science's method establishment mathematical model, and using this model forecast the object possibly displays quantity. Compared with commonly used mainly has: Time series forecast law, return analytic method, gray forecast law and so on.