The growing concern over environmental protection is prompting automobile manufacturers to develop products with better End-of-Life performance. Product remanufacturability is considered as an End-of-Life performance booster. Remanufacturability, that is, the easiness for remanufacturing of products depends on the technical, environmental, and economic feasibilities. The technical feasibility depends on the product design attributes that support remanufacturability. These design attributes are comprised of several sub-attributes. Moreover, the attributes are interrelated with each other. This paper develops a remanufacturability index for automobile systems based on the design attributes that affect the remanufacturability. A structural methodology of graph theory and matrix approach is applied for developing the remanufacturability index. The design attributes and their interrelations with due consideration of their structure is modelled through the graph theory. The remanufacturability directed graph (digraph) is defined; the nodes of this represent the remanufacturability enhancing design attributes, while the edges represent their degrees of interrelationships. The equivalent matrix of the digraph forms a remanufacturability function which leads to the evaluation of remanufacturability index. A higher value of the remanufacturability index indicates that the automobile system has high potential for being remanufactured. The methodology can be applied during the design stage of automobile systems to evaluate the remanufacturability that will enhance the End-of-Life performance. The observations would be helpful to automobile system designers in determining the extent to which the system can be remanufactured and in identifying the specific attributes that can be improved to enhance remanufacturability.

对环境保护的日益关注促使汽车制造商开发出具有更好报废性能的产品。产品可再制造性被认为是使用寿命终止的性能提升。可再制造性，即产品再制造的容易性，取决于技术，环境和经济可行性。技术可行性取决于支持可再制造性的产品设计属性。这些设计属性由几个子属性组成。而且，属性彼此相关。本文基于影响可再制造性的设计属性，开发了汽车系统的可再制造性指标。图论和矩阵法的结构方法论被用于开发可再制造性指标。通过图论对设计属性及其相互联系进行了适当的建模。定义了可再制造性有向图（图）；其节点表示可再制造性增强的设计属性，而边缘表示其相互关系的程度。有向图的等效矩阵形成可再制造性函数，从而导致可再制造性指标的评估。再制造指数的较高值表示汽车系统具有再制造的潜力。该方法可以在汽车系统的设计阶段中应用，以评估可再制造性，以提高使用寿命。