一、前言当前国民经济调整时期,需要对生产的产品品种进行调整,对过时的滞销产品进行更新换代,转向生产畅销的新产品,以满足社会增长的需要。这样一来,研究试制的新产品品种必然大大增加。为确保设计试制新产品的可靠性,需要对研制方案进行分析比较,从中选优。随着社会生产的迅速发展,产品更新厨期加快,因此 I. Introduction In the current period of national economic readjustment, it is necessary to make adjustments to the varieties of products produced, to replace outdated unsalable products and shift to producing best-selling new products to meet the needs of social growth. As a result, the research and trial of new product varieties will inevitably greatly increased. In order to ensure the reliability of the design and manufacture of new products, we need to analyze and compare the research and development plans and select the best ones. With the rapid development of social production, the pace of product refreshment has accelerated