The Twitter [Engineering Effectiveness team] motto is: “Quality, Speed, Joy”.
Those are the three things we are trying to affect across all of Twitter engineering.
Unlike that other famous triple, Fast, Cheap, Good, we believe you don’t have to pick just two. In fact they feed into each other: Building things right will let you go faster. Building faster will give you more time to experiment and find your way to the right thing. And everybody enjoys building good stuff and a lot of it.
Source: Let a 1,000 flowers bloom. Then rip 999 of them out by the roots.