Software reliability predication of digital fly control system

With the rapid development of computer technology, software plays an important or decision-making role in computer control system, especially in digital fly control systems. How to determine and improve the reliability of software is a critical problem demanding urgent solution. Traditionally, the software reliability is determined according to the reliability model based on software testing data after the software has developed, which are not suitable for improving its reliability. This paper studies a method to predicate the software reliability in early development period so as to provide the basis for improving the reliability of software. Application of digital control software system indicates that this method can predicate the reliability of software in the early development period especially in the requirement period and outline design period effectively. The predication result shows that this method is content through the testing data after the digital control software system has developed.