- Tags:: #📚Books , [[My management principles values and practices|My Management Principles Values And Practices]], [[work-methodology|Work Methodology]] - Author:: [[steve-mcconnell|Steve Mcconnell]] - Liked:: 6 - Link:: [Code Complete, 2nd Edition](https://www.oreilly.com/library/view/code-complete-2nd/0735619670/) - Source date:: [[1996-01-01]] - Finished date:: [[2016-01-01]] - Cover:: ![[cover_code_complete.png|100]] 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)