The way I explain it is that the biggest part of what I do is building a mental model of how the subsystem I am working on should work, or how it does work, in

The way I explain it is that the biggest part of what I do is building a mental model of how the subsystem I am working on should work, or how it does work, in my head. That this model has many, many pieces, and building it is akin to painstakingly building a house of cards, one level at a time. Then I get interrupted, and 'whoosh', the house of cards comes crashing down. Sure I can get back to there, but I have to repeat the process of building the model. This may not be the way it is for everyone, I am a very pattern-oriented thinker.