因为预测问题所需的信息都来源于历史数据，任何单一的预测法所获的信息是有限的，使用单一算法要冒较大的风险。
Using the sole algorithm has to brave some extent risk for the information the forecast need is from the history data, and the information that any single forecast algorithm attains is limited.
由历史数据推测未来趋势的众多方法中较突出的有：时间序列法、最小平方法、指数平滑法、回归分析和相关分析。
Prominent among the various techniques that can help to extrapolate past date into future trends are the following:time series, least squares method, exponential smoothing, regression and correlation.
基于历史数据和行业相关资料，运用比较法分析判断了NF摩托公司的内部资源和能力状况。
Meanwhile, based on historical data and related documents of the industry, analyzed internal resources and competency of NFMC in the way of comparison.
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