上降充通大学 1.5 Relative cost of bugs SHANGHAI JIAO TONG UNIVERSITY bugs found later cost more to fix" Cost to fix a bug increases exponentially (10x) i.e.,it increases tenfold as time increases E.g.,a bug found during specification costs $1 to fix. ..if found in design cost is $10 ..if found in code cost is $100 ..if found in released software cost is $1000 Software EngineeringSoftware Engineering 1.5 Relative cost of bugs “bugs found later cost more to fix ” Cost to fix a bug increases exponentially (10x) • i.e., it increases tenfold as time increases E.g., a bug found during specification costs $1 to fix. … if found in design cost is $10 … if found in code cost is $100 … if found in released software cost is $1000