Цитата из книги Modern Operating Systems (Andrew S. Tanenbaum (Author), Herbert Bos (Author))
«Various researchers have repeatedly studied the number of bugs per 1000 lines of code (e.g., Basilli and Perricone, 1984; and Ostrand and Weyuker, 2002). Bug density depends on module size, module age, and more, but a ballpark figure for serious industrial systems is between two and ten bugs per thousand lines of code. This means that a monolithic operating system of five million lines of code is like- ly to contain between 10,000 and 50,000 kernel bugs. Not all of these are fatal, of course, since some bugs may be things like a minor misspelling in an error mes- sage is rarely needed.»
«Modern Operating Systems» Andrew S. Tanenbaum (Author), Herbert Bos (Author)