Theoretical modeling is like sculpting (Blokpoel, 2018). There is no fixed procedure. It requires creativity and the occasional courage to try something new. While a sculptor may have a general idea of what type of sculpture they want to make, it is by looking at intermediate states that they decide how to proceed; e.g., chisel away a piece of rock, add some more clay, or start anew. They only know that the sculpture (analogously, theoretical model) is done when they see it meets their standards.