Two new metric were calculated in order to further analyze the data. Firstly, time in design phase per one thousand added and modified codes (Time Design/KLOC) designated the ratio of all time used in the designing phase based on the amount of source code created in the program. Secondly, overall defects per one thousand added and modified codes (Defects/KLOC) displayed information of significance between means of these two groups of data. The significance is set at a = 0.5. Figure 4 display the value of both new metrics.