Integrated model for software component selection with simultaneous consideration of implementation and verification

► An integrated decision model is proposed to select components reuse scenarios and determine the optimal number of test cases. ► An Objective of the model is to minimize development cost and satisfy the required system and reliability requirements. ► Lagrange relaxation decomposition (LRD) method with heuristics was developed to solve the integrated decision problem. ► Combined with the Lagrange multiplier-determined heuristic, the proposed algorithm can determine global optimum solution.