11. Great Software Does what it says on the tin Does a few things very well Doesn’t eat your PC Doesn’t eat someone else’s PC Gently delights the user
12. Team Size Two people per feature No more than 3 features in parallel Big Team = Many Features Keep the team small
13. The Demands of Fashion Many silver bullets Go with the flow Tailor the fashion to the customer Don’t obsess Prepare for and expect change
14. Constants X developers will tend to lead to X+1 concurrent features Software will get slower faster than hardware will get faster 80% of your software will be written by 10% of your developers 50% of you bugs will be created by 5% of your developers It costs 10k per month per member to fund a software development team