The technique for order preference by similarity to ideal solution (TOPSIS) is one of the most important methods of weighting analysis. A discerning observation of the procedure reveals that the calculation step is subjectively postulated, that means the different applied weightings can result in a different output. This uncertainty is undesirable; thus, the paper uses a technique for order preference by similarity to calculate the rational result for the system. And the model was tested using a data set of flight training simulator. The final result provides the most precise weighting for the system, and enhance the application of the technique for TOPSIS.