We report an approach targeted to aid design exploration, early decisioning in model refinement, optimization and trade offs. The approach consists of SystemC AMS coupling with a descriptive functional simulator. System engineering tools are typically used in design and analysis of system prototypes captured at very high level. Naturally, in high level analysis accuracy and detail of results is compromised in lieu simulation speed and design effort. In the presented approach, the much needed abstraction and simulation speed is retained during simulation of platform architecture while near implementation models (RTL, SPICE) may be also be cosimulated with the architecture.