Adaptable products can meet different functional requirements in the product life cycle by adding or replacing function modules of the products. Product’s architecture builds relationships of functional modules to support feasibility of the adaptable products to be upgraded based on users’ needs. A final adaptable product is formed by the combination of different functional modules. This paper introduces a quantitative measure of product adaptability based on the product architecture, interface complexity and operation ability. Design efficiency of module interactions is introduced to evaluate product adaptability based on the design solution and related operation constraints of interactions. An electric vehicle is improved for the adaptability based on the proposed evaluation method.

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