Research on size estimation model for software system test based on testing steps and its application

In this paper, a function testing size estimation model based on testing steps is proposed. The model applies to black boxtesting, and can be used in dependent test as a third party, This model is conducted overall analysis on COCOMO model. Its basic steps include: design test cases, sum total test steps, define the parameters in the model based on the pattern of model, define size factor, and calculate test Size. The model is applied in some test projects. The applications indicate that this model can be used to estimate the size,and bring positive effect to software test.