[dmckeon]

Many cheap fast improvements now are better than one perfect improvement later. (see also: "I don't need it perfect, I need it Tuesday" (Sam Goldwyn?) and "cheap, fast, good: pick two."

I think the bullet part of the metaphor has more to do with https://en.wikipedia.org/wiki/Magic_bullet_%28medicine%29 than with Fred Brooks, the Lone Ranger, or werewolves.