To design an optimal model from the MIS, we study 11 system input variables such as, Total lines of code including comments (LOC), Total code lines (CL), Total character count (TChar), Total comments (
TComm), Number of comment characters (MChar), Number of code characters (DChar), Halstead's program length (N), Halstead's estimated program length (N), Jensen's estimator of program length ([N.sub.F]), McCabe's cyclomatic complexity (V(G)), and Belady's bandwidth metric (BW).