As a rule, software systems do not work well until they have been used, and have failed repeatedly, in real applications.
- Dave Parnas
 
The negative side of hiring people who do not want or need rules to work is that these people often have to learn by painful trial and error.
- R. W. Selby, Microsoft Secrets: How the World's Most Powerful Software Company Creates Technology, Shapes Markets, and Manages People by Richard W. Selby (Introduction), Michael A. Cusumano (Introduction , ISBN: 0684855313
 
At first sight, the idea of any rules or principles being superimposed on the creative mind seems more likely to hinder than to help, but this is quite untrue in practice. Disciplined thinking focuses inspiration rather than blinkers it.
- G. L. Glegg - The design of design, 1969 (quoted by Brooks)
 
As Thomas Hobbes observed in the 17th century, life under mob rule is solitary, poor, nasty, brutish, and short. Life on a poorly run software project is solitary, poor, nasty, brutish, and hardly ever short enough.
- Steve C McConnell, Software Project Survival Guide by Steve C McConnell , ISBN: 1572316217 , Page: 7, Chapter 1