Yuri Ezhkov

“Managers know that software development follows Parkinson's Law: Work will expand to fill the time allotted to it. If you are in the software business, perhaps you are familiar with a corollary to Parkinson called the Ninety-Ninety Rule, attributed to Tom Cargill of Bell Labs: "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." This self-deprecating rule says that when the engineers have written 90% of the code, they still don't know where they are! Management knows full well that the programmers won't hit their stated ship dates, regardless of what dates it specifies. The developers work best under pressure, and management uses the delivery date as the pressure-delivery vehicle.”
― Alan Cooper, The Inmates Are Running the Asylum: Why High Tech Products Drive Us Crazy and How to Restore the Sanity