We think about threats against our assets: our families, our jewelry, and our sentimental and irreplaceable photographs (well, those of us old enough to have photos that never existed in digital form do). We model threats based on architecture: there’s a wall here, a picture window there, and an easily climbed tree that we can use when we forget our keys. And we model threats based on attackers. We worry about burglars and kids falling into pools. We also worry about the weather, be it earthquakes, snow, or tornadoes. If I wanted to sound like a management consultant, I’d say you employ a mature, multi-dimensional assessment process, with a heavy reliance on heuristics and low reproducibility across instances.