Model Development Visualization - Spiral

In response to the topic “ One model of the process of building and maintaining a project ”, which I criticized, I propose my own version of the visualization of the development process. Unfortunately, I did not find anything in Google. I suppose the idea is not original. Too obvious.
Please look at the visualization



The basic principles are written on the picture itself.
The theory of development in a spiral probably many have heard in history lessons.
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The green mark is the development discipline.
As you can see, it is in the initial stages, but it is not enough. With each iteration of the development becomes more, the complexity increases, then, by the end of the project, it falls.
The opposite situation will be observed during testing - at the end of the testing project there will be more and more. I did not show all the necessary disciplines so as not to clog up and so ugly schedule.

I propose to measure the length of the iteration along the Y axis. "Height" of the coil. It can also change. At the beginning of the project, the iterations are short, then they are extended, then again become shorter. The fixation stage of the iteration result is located at the “junction” of two turns.

Unfortunately, I am not an artist, I was not able to depict exactly what I want to show you.
In fact, the iteration turns must be deformed. Ideal turns-circles in a real project will never be. Rather, it will be twisted ovals.

Please criticize the idea, evaluate its vitality.