A classification of a software error or fault based upon an assessment of the degree of impact of that error of fault on the development or operation of a system(often used to determine whether or when a fault will be corrected).

• 根据软件错误或故障对系统的开发和运行的影响程度所做的估价进而对这些软件错误或故障进行的分类（通常用来判定是否要对某一故障进行校正，以及何时予以校正）。