4 ms·

90% + 90% == 180%

• gus_massa 8y ago
  http://www.catb.org/jargon/html/N/Ninety-Ninety-Rule.html http://www.catb.org/jargon/html/N/Ninety-Ninety-Rule.html
  • _Schizotypy 8y ago
    “The first 90% of the code accounts for the first 90% of the development time. The remaining 10% of the code accounts for the other 90% of the development time.” It appears that even in this case, 90% of the time is used up. They then go to make a statement about "the other 90% of the time" rather than saying something like "90% of the remaining time" 90 + 90 still = 180
    • gus_massa 8y ago
      It's a joke. The idea is that people underestimate the time/work that is needed to fix the final details, so when they have a good draft they think they have done 90% of the work. But when they try to finish the work, all the minors details take more than what you expected and you realize that the initial estimation that it would be only a 10% of the work is very wrong.