This question is hypothetical and has no correlating data for it. I'm trying to give an example of how a function tree is structured.

Develop a function tree to produce a device that is capable of converting wood chips into a fire log.

1. Express the overall function for the system.
2. Break down the overall function into a set of subfunctions.
3. Draw a block diagram showing the interactions between the subfunctions.
4. Draw the system boundary.

List the steps needed to generate the functional structure.