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Ninety-Ninety Rule

A rule for tracking computer programming development time.

The full statement of the rule is, "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."

The rule simultaneously emphasizes two important points in software development. The first is that for almost any product, most of the development time will be used on relatively small but difficult sections of the code. The second is that the first point often leads to extremely optimistic project schedules.

The ultimate lesson to learn from this rule is that the amount of the project that is completed is NOT tied to the amount of code completed, and that substituting one for the other can be disastrous.

The ninety-ninety rule is often mistaken for a typo, with users assuming that the first 90% of code should correspond to the first 10% of time; while this is logically correct, it is NOT the original aphorism.
A: "This stupid ten-line function is somehow crashing on one out of every 100 calls and nobody has a clue how to fix it. We've got a week left in the schedule and haven't even fully identified the problem."

B: "Ninety-Ninety Rule. You should have expected from the start that something like this would come up."
by DubbaEwwTeeEff November 3, 2009
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nimetullah

nimetullah is a name which is used by armenian, kurdish, persian and some danish people and means gift of god.
one nimetullah person can be so intelligent and intellectual at the same time. They might even can get you on your knees effortlessly just because having

big d*CK(real) energy all the time
-muy bien?
-DamnNN bro,u meant nimetullah??
by aiden02 May 22, 2022
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Related Words
Nipet Nietzsche niketa nipster Niceties Niket nineteen nipe NIGET Nietzche

doing ninety

We were doing ninety up the road
by Taylor FTW September 2, 2012
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NHL Ninetysex

You let a girl have sex with you while you are playing NHL 96 on Sega Genesis.
I flaked on going out with my friends last night and had NHL Ninetysex instead. It was awesome, I was the Hartford Whalers and beat the LA Kings while my girl was on top.
by Party Crashers August 22, 2009
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Ninety-Niners

Lab slang describing a group of quantum-computing researchers that has prepared a Bell-state using a two-qubit entangling gate with a fidelity equal or higher than 99 %.
German lab rat: The Raman laser is not locking again.
Indian lab rat: Hold my beer, I’m tweaking the PID parameters.
Spanish lab rat: Come on guys, without sideband-cooling we’re not Ninety-Niners anymore!
by Hyonoko September 28, 2021
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gone nineteen

when everything is changed, all rules go out the window and reality is put on it's head because anything is possible. Comes from Stephen Kings Dark Tower series.
They knew that they were beyond Ka now, everything had gone nineteen.

They were in the land of nineteen.

"Dude i dunno what the fuck, i feel like everything is going nineteen on me."
by a different name brandon April 2, 2008
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drop nineteens

An early-mid 90s alt rock band out of Boston
yo, have you heard "Skull" by the Drop Nineteens?
by WarGoatForestWolf666 April 11, 2010
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