Evaluation of defending efficiency in engineering based on improved grey interrelated analysis method

In order to research and evaluate the defending efficiency in engineering,the six indexes involving the defending efficiency of engineering were put forward.Each index has its own attribute,importance and comparability,which makes the process of scheme's selection grey.Analysis of classical grey interrelated analysis method indicated its localization,and improvement was made on distinguishing coefficient,entropy weight and projection method.Through the evaluation of defending efficiency and comparison with classical grey interrelated analysis method,the model proves to be credible and practical.So this model can be used extensively in actual task.