> after you finish the first 90% you need to finish the second 90% (I forget who said this).
I don't know who said it either, but I heard an alternate phrasing: "The first 50% of the project takes 90% of the time. But the second 50% takes the other 90% of the time."
I probably should've just Googled it as it was easy enough to find. According to Wikipedia [1], it was Tom Cargill of Bell Labs and it's called the 90-90 rule:
> The first 90 percent of the code accounts for the first 90 percent of the development time. The remaining 10 percent of the code accounts for the other 90 percent of the development time
I don't know who said it either, but I heard an alternate phrasing: "The first 50% of the project takes 90% of the time. But the second 50% takes the other 90% of the time."