The correct failure prediction of UK construction companies is particularly important. Over 100 years, financial ratios have been the main sources of company assessment. A ratio is usually defined as a proportion of one (or more than one) accounting figure to another (or more than one) accounting figure. The advantage of using ratios is that a ratio has no dependence on company's size. The common techniques based on financial ratios for company failure prediction are LDA, LR, BPNN, unsupervised self-organization neural network and PNN. Because these techniques ...