Form analysis is not a system because it requires imagination and thought and decision making, hence the word analysis

Analysis is when a whole is broken into it's individual parts, as opposed to synthesis where each individual part is formed into a whole.Systems men break down the whole into individual parts and assign a value to each part.From the sum of those values comes a rating.In other words they analyse and then synthesise.

The value given to each part requires imagination,thought and decision making too.The really clever guys then create a computer program which enables them to take the legwork out of it.

After that comes the really intelligent part.They keep it themselves.