Adaptable design is a new design approach to create products that can be easily adapted to satisfy the
changed functional requirements. Adaptable design approach can reduce the environment impact as well as
to improve product competitiveness by replacing multiple products with a single adaptable product. In this
research, a method to evaluate adaptabilities of mechanical products based on configurations of these
products is introduced. In this method, different functional requirements are described by adaptation tasks.
Each adaptation task is achieved by a product whose configuration is modeled by a number of modules
based on modular design approach. Adaptation from one product to another one is conducted by changing
modules (i.e., adding new modules and removing existing modules) of this product. Adaptabilities of a
product to change to other products considering the adaptation tasks are obtained based on the required
costs to change from configuration of this product to the configurations of the adapted products. An industrial
application is provided to show the effectiveness of the introduced method.