Sculpting the model

Software development of any kind is like creating a clay sculpture:

We start with our understanding of the problem and solution domain (the clay and base) and then we start making stuff. We add, update, and remove until we're happy. Working with 3D forms is much the same as coding.

There are two models at any given time: the ideal mental model in the developer's head and the physical model that has been coded into the software product.

The developer identifies solvable differences between these two models and either A) modifies the code structure so it more closely resembles his ideal mental model or B) changes his mental model (expectations) about how closely the product must conform to his standards.

In other words, software development is subjective, but the judgment of the end product (art) is in the eye of the beholder.