The Goal was very eye-opening to me since before that I've always have worked only on the side of business where I give my best to sell as much as possible and

The Goal was very eye-opening to me since before that I've always have worked only on the side of business where I give my best to sell as much as possible and never cared about how are we then going to deliver this, handle the peaks that I create or the lows when I fail. In this context for me it was the fundamentals that I needed to have in order to have meaningful conversations about capacities, production bottle-necks and optimisation without making the conversation a tutoring session for me.