Much of human existence consists of efforts aimed at making sure that things don't go wrong, fall apart, break down, or stop running until a decent interval has elapsed after their manufacture(11. 5-7) People spend much of their lifetime trying hard to keep things in good shape. They think a product, after leaving its factory, should last at least for a reasonably long period before ceasing to workMuch of human existence consists of efforts aimed at making sure that things don’t go wrong, fall apart, break down, or stop running until a decent interval has elapsed after their manufacture. (11. 5-7) -- People spend much of their lifetime trying hard to keep things in good shape. They think a product, after leaving its factory, should last at least for a reasonably long period before ceasing to work