If you do nothing else before you launch your Agile Release Train (ART) baseline your metrics! At some point, in the not too distant future, you are going to be asked, how do you know your Agile Release Train is making a difference? For you the answer might be obvious - it just feels better. It was very much that way for me with my first ART. Metrics weren’t the first indicator that things were getting better, it was the changes in behaviour.