上游充鱼大 SJTU School Of Software 2009-2-3 Cost/benefit Testing takes more than 50%of the total cost of software development More for critical software Software quality will become the dominant success criterion 软件学院SJTU School Of Software 2009-2-3 软件学院 Cost/benefit • Testing takes more than 50% of the total cost of software development – More for critical software • Software quality will become the dominant success criterion