The first thing which came to our mind when we thought of protection was the protection from the environment. This we further divided into the following elementary functions: protection from wind, sun, rain, snow, dust, and hot/cold weather.
All of these features are inseparable from the other topics, like water, energy, etc. For example the protection from excess heat minimizes or even eliminates the costs of air conditioning. Also the protection from the rain is very close to the idea of gathering rainwater; thus we were able to fulfill two goals in one function.
Functional analysis - Protection
A function tree was created, where the function - 'Protection from the environment' - was divided into branching sub functions.
