The stove where I live right now has knobs whose full range of motion is a quarter-turn, and the flame goes out if you turn it more than halfway down, so effectively you only have one-eighth of the knob to use. If you try to set it to low heat, you'll usually go too far and put the flame out unless you pick up the pan and watch the burner while turning the knob a millimeter at a time.
It's absolutely amazing what people can manage to screw up.
One integration test should be to take the engineer in charge, bind one arm behind his back and tell him to make Spaghetti aglio olio peperoncini for Gordon Ramsey waiting with a Santoku knife ready for some action.
Edit: To clarify - Aglio olio is what they cook in prison in Good Fellas. It's both the most simplest pasta dish and the easiest to screw up - overcook the garlic a bit and you get garlic chips instead of melting their flavour into the sauce.
It's absolutely amazing what people can manage to screw up.