Encyclopedia > Ninety-Ninety Rule

  Article Content

Ninety-Ninety Rule

In computer programming and software engineering, the ninety-ninety rule states:
"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 is attributed to Tom Cargill of Bell Labs, and was made popular by J. Bentley's September 1985 "Bumper-Sticker Computer Science" column in Communications of the ACM. It expresses both the rough allocation of time to easy and hard portions of a programming project and the cause of the lateness of many projects (that is, failure to anticipate the hard parts).



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
242

...     Contents 242 Centuries: 2nd century - 3rd century - 4th century Decades: 190s 200s 210s 220s 230s - 240s - 250s 260s 270s 280s 290s Years: ...

 
 
 
This page was created in 26 ms