You can certainly use the tool to make these trade-offs. What I meant and didn't say is that you also have to look at what you want to do with the forces. If you want to increase, for strategic reasons, some types of capabilities, you also have to look at what you want to do with your defence policy. That is what I didn't say but what I meant.
The tool is very useful in determining the trade-offs, but you have to do that keeping in mind that it will have geopolitical and policy implications. The tool is obviously not built to do that.
Doing a reduction or an expansion exercise will be possible to do with the tool—how much it would cost you or how much it would free up in terms of resources—but it doesn't take into account the other considerations. That is what I should have said and I didn't say in my previous answer.