When you work as a professional programmer, chances are you’ll know somebody (or you are somebody!) who’s going through this common development horror story: “We started working on this project five years ago, and the technology we were using/making was modern then, but it’s obsolete now. Things keep getting more and more complex with this obsolete technology, so it keeps getting less and less likely that we’ll ever finish the project. But if we rewrite, we could be here for another five years!”

Another popular one is: “We can’t develop fast enough to keep up with modern user needs.” Or, “While we were developing, Company X wrote a product better than ours much more quickly than we did.”

We know now that the source of these problems is complexity. You start out with a simple project that can be completed in one month. Then you add complexity, and the task will take three months. Then you take each piece of that and make it more complex, and the task will take nine months.