Authors:

Software is usually expected to be modified over the course of its productive life. The process of converting one correct program into a different correct program is extremely challenging.

Douglas Crockford (2008). “JavaScript: The Good Parts: The Good Parts”, p.94, "O'Reilly Media, Inc."
Software is usually expected to be modified over the course of its productive life. The process of converting one correct program into a different correct program is extremely challenging.