- Tags:: 📚Books , My management principles, values, and practices, Work Methodology
- Author:: Steve McConnell
- Liked:: 6
- Link:: Code Complete, 2nd Edition
- Source date:: 1996-01-01
- Finished date:: 2016-01-01
- Cover::
About design before implementation:
If you can prevent defects or detect and remove them early, you can realize a significant schedule benefit. Studies have found that reworking defective requirements, design, and code typically consumes 40 to 50 percent of the total cost of software development (Jones 1986b; Boehm 1987a). As a rule of thumb, every hour you spend on defect prevention will reduce your repair time “3 to 10 hours” (Jones 1994). In the worst case, reworking a software-requirements problem once the software is in operation typically costs 50 to 200 times what it would take to rework the problem in the requirements stage (Boehm and Papaccio 1988). Given that about 60 percent of all defects usually exist at design time (Glib 1988), you can save enourmous amounts of time by detecting defects earlier than system testing. (p. 71)