The phrase "to develop the model" means to create or improve a plan, system, or idea in order to make it more useful, effective, or accurate. Full definition
• Experienced in developing models for cash flow transactions, portfolio monitoring and loss projections. (resumemycareer.com)
To help coastal communities, many climate scientists are taking a close look at fog with the aim of developing models of future fog patterns. (eos.org)
Until last month, I was involved in developing a modelling tool to work out how to use bubbles of air and gas to try to get oil out of water. (newscientist.com)