1) In Fig. 3, similar to [20], the idea of the method in selecting of the components is presented. The method
surrounded by reference architecture because the reference architecture has a high impact on the
selection of the components. Reference architecture defines requirements for components on the
product line and limiting them to follow the rules. In the beginning step, a components list should be
selected from component lists with respect to the architecture variant point. The components of the list can
be selected from COTS components (COTS components are on the shelf that are produced by our
organization or other entities.) or previously–produced components or be produced specially for the
product line.