Simple also has fewer points of failure. Complicated things break more easily. This principle is as true in rocket science as it is in business, computer programming, and relationships. Every time you introduce complexity to a system, you’re giving it one more aspect that can fail. As the safety manager for Apollo 8 remarked, the spacecraft had 5.6 million parts, and “even if all functioned with 99.9 percent reliability, we could expect 5,600 defects.”
