Key question(s) for synthesis? a What functions do need to get the job done? a Is there a way to combine existing systems to do the desired functions without having too many extra functions and too much extra form? a What rules do I have to apply to do this?Key question(s) for synthesis? † What functions do I need to get the job done? † Is there a way to combine existing systems to do the desired functions without having too many extra functions and too much extra form? † What rules do I have to apply to do this?