Ethylene crackers are one of the most difficult units to model. Technip Energies’ proprietary SPYRO® program is the industry standard for modeling ethylene furnace operations. Modeling this industrial process becomes arduous as the intricate interplay of thousands of chemical reactions must be painstakingly accounted for.  While SPYRO® simulates the most important part of the ethylene production process, the furnace model needs to be incorporated into the larger ethylene plant flowsheet. SPYRO® was originally a stand-alone design tool that has now been integrated into a variety of convenient platforms, among them AVEVA Process Optimization, AVEVA PRO/II Simulation and AVEVA Dynamic Simulation. A streamlined interface with integrated SPYRO® will simplify the overall mass balance and simulation of an ethylene plant, making the process more efficient and effective.