I'm a big fan of being able to generate a document and know that the results are all based on the same, latest data and the same code. The more different things

I'm a big fan of being able to generate a document and know that the results are all based on the same, latest data and the same code. The more different things I have to do to generate it all from scratch the more likely there's something I'll forget when I have just fixed a problem somewhere.