Abstract: Classification of software defects is the basis of software defect management． The concept of software defects, is presented in this paper,and some kinds of software defect classification methods and their merit and flaw are analyzed in detail. According to analysis of spacecraft embedded software development process and its defective types, a classification method is proposed for spacecraft embedded software defects, particular for defects types and its subclass of “implementation and coding errors”.  

Key words: software defect, spacecraft embedded software, defect classification