When I was developing my practice project for high-school graduation exam I did a mistake 15 minutes before end of dedicated time. I somehow deleted my source code. It was horrible and I knew that I did not have any time to rewrite it from a scratch. Fortunately I realized that my source code editor was automatically doing backups and that saved me. I was lucky that time and I learnt my lesson that software factory cannot be chaos but it should be CHAOS: C ontinues H elpful A utomated O rganized and S mart. And I can tell that after 21 years I use more sophisticated software factory in my team which follows that principle: IDE for development: allows fast writing/debugging/profiling of the code, documentation and configuration; the project setup must be generic so developers should be able to use any IDE without project setup change: Eclipse Source code repository: provides effective & safe storing of the code, documentation and configuration with easy branching