Tutorial 1 - Gall's Basic Systems Axioms (Nguyen Nang Chung)

13.     A simple system may or may not work 

Modern operating systems are increasingly complex and require a large number of individual subsystems and procedures, operators also must cooperate to make them function. Not only a complex system fail or happen errors but also the simple system may or may not work.As you know all systems can fail in an infinite number of ways, but they can work in only a few ways. In other words, the success rate is not high.If you can’t guarantee success and do not prepare for any situation can be happened,  then the best you can do is try to improve the odds. The most effective way to do so is to follow the old principle (Keep It Simple, Stupid).

For example : When you had a simple assignment or simple project, but you underestimated the project and consider it very simple.After that you've subjective and worked with that thought. Unluckily, your software happened a lot of problems. It didn’t work.Which means it is not all guarantee that all simple software must work.