1. If anything can go wrong, it will.
2. Systems in general work poorly or not at all.
3. Complicated systems seldom exceed five percent efficiency.
4. In complex systems, malfunction and even total non-function may not be detectable for long periods (if ever).
5. A system can fail in an infinite number of ways.
6. Systems tend to grow, and as they grow, they encroach.
7. As systems grow in complexity, they tend to oppose their stated function.
These and many other observations (laws) can be found in somehow forgotten work of Bart Stewart "Systemantics".