在上两讲里,介绍了五种经济比较方法。在本讲里将要评价其优缺点,并建议选用的原则。对于同一给定的资料,如果正确地使用上述前四种方法,可以选出同一最优方案。正如第六讲中表1的例子所示,应用前四种方法的结果,都认为方案B是最优方案。因此,它们是比较科学和常用的。但各种方法在计算的难易程度和成果的表达方式及是否易于理解方面,也各有其优缺点。在实际工作中选用方法时,应当考虑这些因素。第五种方法和其他一些传统方法一样,具有比较简单、形象的优点,但都不够严密和科学,因此其结果一般只能作为参考。 In the last two lectures, five economic comparison methods were introduced. In this lecture, we will evaluate its advantages and disadvantages, and propose the principles for selection. For the same given data, if the above four methods are used correctly, the same optimal solution can be selected. As shown in the example in Table 1 of the sixth lecture, using the results of the first four methods, it is considered that scheme B is the optimal scheme. Therefore, they are more scientific and commonly used. However, various methods also have their own advantages and disadvantages in terms of ease of calculation and the way in which results are expressed and easily understood. When selecting methods for practical work, these factors should be taken into account. The fifth method, like other traditional methods, has the advantage of being relatively simple and visual, but it is not strict enough and scientific, so its results can only be used as a reference.