Before diving into the detail, it is very important to have a good understanding of the big picture. What is the ideal outcome? Are there any contradictions or conflicts that this creates? How can these contradictions be satisfied? TRIZ is a method of working that enhances the process of problem solving and creating Innovative solutions. It's not a magic formula and it doesn't replace your ability to innovate but it does enhance it. Often, approaching a problem from a different angle will reveal much larger benefits than pushing harder in the same direction.
Here are some examples of the type of system level engineering that we can help you with