Why do multi-fault problems still send our team in circles?

You handle the simple faults alone. One symptom, one cause — you find it, you fix it, you move on. But put two or three faults together, or add real danger to the mix, and you freeze. Or you thrash, changing things at random, hoping something sticks. This is not a sign you lack skill. It is a sign you are testing the whole system instead of one part at a time. Working with others makes it worse, not better, if you let it. Three people chase three theories at once. Nobody tracks what's already ruled out. You repeat the same dead end three times before someone notices. Here is what you must choose instead. Slow down before the dangerous steps. Agree, out loud, on what each person checks. Write down what's ruled out so no one tests it twice. The method is not exciting. It is just method — and method is what ends the circling.